PDF malware analysis — malicious · e8196c97a0148068

MALICIOUS

PDF

109.6 KB Created: 2021-06-30 18:30:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 01480823c13fc7347a2d3b7204b229b4 SHA-1: d280001c0de1baefcf9e8e83591ba41c1038e549 SHA-256: e8196c97a01480682e7780cfa795a3d27f877f943aed1faf6ae5ea028b704d69

256 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document employs a lure related to advance-fee scams and explicitly requests recovery secrets or private keys from the user. The presence of numerous links to compromised CMS upload storage and disposable hosting suggests an attempt to distribute malicious files or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9780

Heuristics 8

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE

Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE

Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://stonebreaker.at/zunalinexepowusamiralig.pdf In PDF document text
- http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160cee1d60f155---luxurawek.pdfIn PDF document text
- https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16084f9347b2ef---6935201564.pdfIn PDF document text
- http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160954eb892c15---67976733400.pdfIn PDF document text
- http://niestachow.pl/data/aktualnosci_imgs/file/22899855268.pdfIn PDF document text
- http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d23009331---sefowitugovegetef.pdfIn PDF document text
- http://mikailang.net/userfiles/file/20210503003734_1459336813.pdfIn PDF document text
- http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/4a5d96a502472ceef0b52c68f16b5da6/tobikewadabamesekopurej.pdfIn PDF document text
- https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740062a28d4---76251460216.pdfIn PDF document text
- http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/7f1187bfc04c397b47469a0e390d8e0b/25805062361.pdfIn PDF document text
- http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160943c3195a13---muvewuxerunudojizuzazu.pdfIn PDF document text
- https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0832f4aca9---paroluluwedepapa.pdfIn PDF document text
- http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16081d07441979---zumiditep.pdfIn PDF document text
- https://incoyun.com/calisma2/files/uploads/piremamolexak.pdfIn PDF document text
- https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/d8ac68f47c15140280dc974ef1f0e8c2/lavobapupijulegupapasisu.pdfIn PDF document text
- https://unique.global/wp-content/plugins/super-forms/uploads/php/files/0d60bb31b8ae10888a6fda73f54a7391/93800474585.pdfIn PDF document text
- http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607afff641568---zivirigulakisoleg.pdfIn PDF document text
- https://ratco-hardware.com/Ups/files/pewowopaku.pdfIn PDF document text
- https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/tc4nkc43a2fcsa8fr087fms5qn/duganunupunolezuzikas.pdfIn PDF document text
- http://donahoelawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/2005080300.pdfIn PDF document text
- http://www.bandungmesin.com/file/loneper.pdfIn PDF document text
- https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/fe4d7c2dc56cce47c4c4f6b7061c4f4e/91141804068.pdfIn PDF document text
- https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/5frlphl7t1poaq0qqm35kfjve0/33358195334.pdfIn PDF document text
- https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723d6b77da9---kubijimigasimeponemavo.pdfIn PDF document text
- https://berbagiangka.com/contents//files/94458998247.pdfIn PDF document text
- http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160776a338eee7---wosasalapakujonarureruki.pdfIn PDF document text
- http://hotelbelleepoque.bg/userfiles/file/tepagunotivitiviriru.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=sql+get+row+with+max+valuePDF link annotation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000142c7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x142C7	10860 bytes
SHA-256: `850faebeb4260d51e99106512b5c30570955e8c057d1ed17434bbd3a2cacfe7f`
`font_01_sfnt_off00015ba9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15BA9	19464 bytes
SHA-256: `c3f7a27372e065c9930006423849db9851f773d2f900b654eae1aaadfc47ba6f`
`font_02_sfnt_off00018f7d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x18F7D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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