PDF malware analysis — malicious · 0abc9f9f3218a594

MALICIOUS

PDF

79.2 KB Created: 2021-09-15 18:05:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: a3cb9d78dda727a758607b27b71ea8de SHA-1: 84d5e9cbb114ed62f58ed84f7a6003f75c775ac6 SHA-256: 0abc9f9f3218a5943be5e7a1534d182f8140b5f54072b16268da578e26d7db38

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of a phishing lure. The heuristic 'SE_PAYMENT_REDIRECT_LURE' indicates the document attempts to trick users with fake financial instructions. Numerous URLs were extracted, many pointing to compromised WordPress sites, suggesting a phishing campaign designed to redirect users to malicious sites for credential harvesting or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9978

Heuristics 7

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE

Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
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://garglob.ru/uplcv?utm_term=android+default+account PDF link annotation
- http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16133884ae8dac---26619703994.pdfIn PDF document text
- http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16137086855895---72514557047.pdfIn PDF document text
- http://narnivet.com/userfiles/files/nowanijakedekije.pdfIn PDF document text
- https://0900107678.com/upload/file/65197128445.pdfIn PDF document text
- http://barcelonasixtytwo.com/userfiles/file/safatot.pdfIn PDF document text
- http://khocabien.com/uploads/files/lipagafibapusajujogojofa.pdfIn PDF document text
- http://www.fuchingrading.com/upload/file/vukuviv.pdfIn PDF document text
- http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16133e685e901d---67550733057.pdfIn PDF document text
- https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/4b9928be342eb5c55e9f104bd47a0985/wosekikubagirulurewu.pdfIn PDF document text
- https://y3stwk65l-mn9.com/contents/files/molenojuw.pdfIn PDF document text
- http://kursverwaltung.fit-n-essen.ch/ckfinder/userfiles/files/kopup.pdfIn PDF document text
- http://bnblspecialities.com/userfiles/files/xevulofebikegivenatajijew.pdfIn PDF document text
- http://zpkprzemysl.pl/ckfinder/userfiles/files/fivuwizenunidel.pdfIn PDF document text
- https://pnp-studio.com/fckeditorfiles/file/21848665770.pdfIn PDF document text
- http://geasit.it/userfiles/files/mawofekanodali.pdfIn PDF document text
- http://www.wiz-fac.com/uploadImg/file/37069584952.pdfIn PDF document text
- https://happycolaborativo.com/uploads/files/32114681274.pdfIn PDF document text
- http://1-sanya.com/blog_images/blog_/file/6805195476.pdfIn PDF document text
- http://xenangheli.vn/public/files/54472718734.pdfIn PDF document text
- https://on-call-anatomist.org/ckfinder/userfiles/files/lifuridumuwowe.pdfIn PDF document text
- https://fertilizergranulatorprice.com/d/files/24774816240.pdfIn PDF document text
- http://celyroknaterase.sk/editor_uploads/system/files/30026515019.pdfIn PDF document text
- https://debcopharma.com/userfiles/file/4224680737.pdfIn PDF document text
- 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_off0000d238.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD238	10380 bytes
SHA-256: `54241cc02180dd4209cf32de0b51becc12fe5b18ef4ea19e5f7468ffddfe84fe`
`font_01_sfnt_off0000e9d2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE9D2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000101e4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x101E4	17580 bytes
SHA-256: `301b1305ef6e8afbe3771173183cec577756d7b725d98f23c1c8eb8269919031`

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