PDF malware analysis — malicious · 402856baac46db6e

MALICIOUS

PDF

67.9 KB Created: 2021-04-03 05:08:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 37461d809838de81fca2a8aa3f783d4c SHA-1: 61729904954eaba526c8bdfc1d67bc8c73e35eff SHA-256: 402856baac46db6e29bde188f04014d3776217fe98ba41beae3efd6f249fd91c

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, a technique often used for SEO link farming or to redirect users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, with the primary one being 'https://bimefitovaj.weebly.com/uploads/1/3/1/4/131437299/ec34005493c.pdf'. The ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' and the ML classifier output of 0.829446 further support its malicious nature. No scripts were extracted, but the structure suggests a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.8294

Heuristics 4

Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://soxebez.ru/award?keyword=characteristic+function+examples+pdf
- https://bimefitovaj.weebly.com/uploads/1/3/1/4/131437299/ec34005493c.pdf
- https://wagoburaf.weebly.com/uploads/1/3/4/5/134524365/5354730.pdf
- http://zamirelerubonex.iblogger.org/lagalokizakoforiwobamupoj.pdf
- https://cdn.sqhk.co/zijigemeworu/jXjRDSz/lixorijaxajaj.pdf
- http://instasale.company/kovopijafuzufarupekanucpcuf.pdf
- https://cdn-cms.f-static.net/uploads/4415782/normal_5fe901137dc3d.pdf
- https://cdn-cms.f-static.net/uploads/4451945/normal_60585d36b2117.pdf
- https://cdn.sqhk.co/jumunuji/I7dijhw/free_internet_radio_r_b_oldies.pdf
- https://sebezubajisiv.weebly.com/uploads/1/3/0/7/130740163/wojabamunerawo.pdf
- https://cdn-cms.f-static.net/uploads/4425919/normal_6017a033d82d6.pdf
- http://thecabinets.xyz/wonubama7vxco.pdf
- https://betoxugibujimiv.weebly.com/uploads/1/3/1/0/131071043/vinor-rolatimoxefe-satapunuzej-zasugumaz.pdf
- http://romeita.space/securities_commission_product_highlight_sheet8susm.pdf
- http://matras-24.ru/bawafodutujfj2l5.pdf
- https://cdn.sqhk.co/gafisasiwu/LggibKw/poker_game_world_poker_club.pdf
- https://cdn-cms.f-static.net/uploads/4484605/normal_6023f3b3ec4c5.pdf
- https://cdn.sqhk.co/gasidonoda/pSQNz4k/barredora_manual_karcher_precios.pdf
- http://tedusoxunola.22web.org/how_do_i_reset_my_maytag_front_load_washer.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cabae152-0d18-4cc7-9545-8711a89e332e.filesusr.com/ugd/607e04_b9ff1092957f4747aa273f7f33c5fadf.pdf?index=true
- https://19508648-7f28-415f-8121-b57715dc1465.filesusr.com/ugd/9734e7_523da24dc8b142f5b45f7afc03117ce4.pdf?index=true
- http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e58e.bin` `5b3462ddc3291b9d76a3c3ddd295565ed2de91a84bcfd532ebfb18f7b9b7bb6d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE58E	5368 bytes

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