PDF malware analysis — malicious · 118dbf297c2b450f

MALICIOUS

PDF

90.4 KB Created: 2021-08-18 16:19:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 557cc07e681e3c5faf78b4de69f0d523 SHA-1: debeab482cb26b7f6eea3e8b46c5813bc782134d SHA-256: 118dbf297c2b450fba8939bec140ce89d26b9db23c8a268cb06a84feb049fb3f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file is identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It functions as a link farm, with numerous URLs pointing to compromised WordPress upload storage and other disposable hosting sites. The primary purpose appears to be directing users to external malicious content, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9914

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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 https://lixtech.com.tw/ckfinder/ckfiles/files/domufabafilu.pdf In PDF document text
- https://bandotrading.com/uploads/file/zijozesujulikekonatepu.pdfIn PDF document text
- http://re-view.online/fckFiles/file/xodadabijotaxow.pdfIn PDF document text
- https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/0b67f76e5ee0857f4b18d2bce48828cc/49960985403.pdfIn PDF document text
- https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/mvqmgh6v0vp0ku59is8jbkl2gu/kijefamake.pdfIn PDF document text
- http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610417c6d2e6e---2397699978.pdfIn PDF document text
- http://autoscuolavalerio.it/userfiles/files/sokezuxulutu.pdfIn PDF document text
- http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/b0cc9031a5d50307a23d7c9a87640d0b/wisigowunupo.pdfIn PDF document text
- https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16075b33c511b0---1695729117.pdfIn PDF document text
- http://ankurgroups.com/userfiles/file/fanevolumajuse.pdfIn PDF document text
- http://thaide.org/userfiles/file/8922956430.pdfIn PDF document text
- https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/2d16b2e55c7f84d6d940b2ffd2044a86/99597235279.pdfIn PDF document text
- http://hotelbelleepoque.bg/userfiles/file/dabudevixoniluli.pdfIn PDF document text
- http://kurier48.pl/files/userfiles/file/kasubolifesovotu.pdfIn PDF document text
- http://apexnepaltravel.com/userfiles/file/pukutitobobo.pdfIn PDF document text
- http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16117e4e1b8836---6068868725.pdfIn PDF document text
- https://jotekonybakterium.hu/userfiles/files/gomefajowunugunak.pdfIn PDF document text
- http://crisismobile.com/ckfinder/userfiles/files/tigod.pdfIn PDF document text
- https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/ce538774de19915ccfd826979a34b495/xapavajuwekusaferul.pdfIn PDF document text
- http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce7af4003fa---37205604340.pdfIn PDF document text
- http://balone.net/_upload/file///2921198491.pdfIn PDF document text
- https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/f5fa50ae82bac2a5b360478b8499d7f8/64224498319.pdfIn PDF document text
- https://communeouchamps.fr/userfiles/file/28797748898.pdfIn PDF document text
- http://aiswaryamatrimonials.com/fck_uploads/file/fadezaketate.pdfIn PDF document text
- https://pakianco.ir/data/image/uploads/news/files/kigazafat.pdfIn PDF document text
- http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085d8cb563c2---dolov.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=kara+b%C3%BCy%C3%BC+filmi+indirPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e3ec.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE3EC	16632 bytes
SHA-256: `680e586a1ee573e661d30ea0f7a97a8805d5b79b2e3d5282e6cd27ea8e1e9edb`
`font_01_sfnt_off0000fb01.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB01	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011318.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11318	10436 bytes
SHA-256: `54a23474ea57a77ad7217b718ff455f417fa0236b9c77de9b7e7c0381b63a91d`
`font_03_sfnt_off00012a82.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12A82	19136 bytes
SHA-256: `728e788ff27346d87a172020437671e0622c029775a939dfae334d67a6a48f60`

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