PDF malware analysis — malicious · 7b477e7fd346ad20

MALICIOUS

PDF

69.3 KB Created: 2021-02-27 13:42:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14

MD5: eee14802a8024567413a416d2c662a20 SHA-1: eba969748b57cbfd3eb1291202c46c31803bc48f SHA-256: 7b477e7fd346ad20e6ff3c574fd75944da1440d0c6ec98232385a6c5746a3304

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs, with one specifically pointing to 'zajinet.ru/award' which suggests a phishing or scam lure. The presence of a link farm on disposable hosting further supports a malicious purpose, likely for distributing further payloads or conducting phishing.

Machine Learning

Nyx PDF Classifier malicious score 0.8132

Heuristics 4

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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
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://zajinet.ru/award?keyword=lg+lsxs26326s%252F00+not+cooling PDF link annotation
- http://marketitaly.pro/93566535187b0rp1.pdfIn PDF document text
- http://sedouche.xyz/nokafx7kgq.pdfIn PDF document text
- http://amorexpo.com/38841395835izopg.pdfIn PDF document text
- http://wuwisometojone.66ghz.com/68927066508.pdfIn PDF document text
- http://durebivov.iblogger.org/6692600821.pdfIn PDF document text
- https://rupibofog.weebly.com/uploads/1/3/1/6/131607232/waradigatusaziniw.pdfIn PDF document text
- http://lnstagramservicecopyrights.com/renajiboduwuferibowowibikyzo4.pdfIn PDF document text
- http://tufataf.22web.org/android_tv_box_instruction_manual.pdfIn PDF document text
- http://rankingcoach-seo.com/how_much_is_a_miniature_dapple_dachshundlo48k.pdfIn PDF document text
- http://puboreru.22web.org/navy_eval_ending_bullets.pdfIn PDF document text
- http://forexgeeks.net/bewars_video_songs_teluguw45b1.pdfIn PDF document text
- http://healthit.space/74172342960awzku.pdfIn PDF document text
- http://vukosodo.iblogger.org/bulefeg.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://zebofazedixa.rf.gd/27503871344.pdfIn PDF document text
- http://dilabopitomosif.epizy.com/97982998527.pdfIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e310.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE310	5300 bytes
SHA-256: `8da0d37034713af0c2cbd3b5de39b3b36c7b1f1979b7974171d3edb1a2a87c2b`
`font_01_sfnt_off0000f548.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF548	9936 bytes
SHA-256: `1a0dff4700d84299ccb3f2f5376f0759abf26c170f9b42c096c00ffd6f4f1db8`

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