Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8d80663e3fd6ef2…

MALICIOUS

PDF

65.4 KB Created: 2021-03-06 10:32:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0b53862488cea31a1bfb85fb583a8cc1 SHA-1: 1113da8e350420f3560deb4a4e97b529ef413659 SHA-256: a8d80663e3fd6ef2ddeb6f422cae1d1b1c2f73e2c8a800425e711b56329ba15b
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9443

Heuristics 5

  • 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 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.
  • 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://dugedepap.ru/award?keyword=how+to+reset+kenmore+elite+washer+he4t PDF link annotation
    • https://tepadomuxufebe.weebly.com/uploads/1/3/1/3/131382092/rixokuluwokevubuwa.pdfIn PDF document text
    • https://faxezufag.weebly.com/uploads/1/3/0/8/130874059/fb0cec746b60f.pdfIn PDF document text
    • http://apelsins.space/video_wanna_one_boomerang_live4ql5t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489409/normal_5fc7ffcb9fe44.pdfIn PDF document text
    • http://shoop-fp.ru/aha_acls_pocket_cardr6s9h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375341/normal_6040bd54b78fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402486/normal_6018af5e348ee.pdfIn PDF document text
    • https://gewivobom.weebly.com/uploads/1/3/4/6/134643535/4189957.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484107/normal_5ff806d2c8742.pdfIn PDF document text
    • https://nuravodabola.weebly.com/uploads/1/3/0/7/130740537/nesifabi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454054/normal_6041f2ea66cea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c63ca81c-6df4-4ec3-bc2e-8508f29a6879.filesusr.com/ugd/d48fe3_3cdf238e7ad147bd85dddba91667747b.pdf?index=trueIn PDF document text
    • http://viminug.epizy.com/62502173630.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/high_school_transcript_template.pdfIn PDF document text
    • http://tusibav.epizy.com/zibigexabi.pdfIn PDF document text
    • http://gaxomin.rf.gd/activation_lock_bypass_removal_tool.pdfIn PDF document text
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_e18820e17863412298f68c8b66e0bb30.pdf?index=trueIn PDF document text
    • http://gotikomerutoj.rf.gd/xujegipikeduj.pdfIn PDF document text
    • https://ee67c5b3-b4d3-4257-b425-af55881d3a68.filesusr.com/ugd/c60da7_794e8247f77a4f8ca673bc38e5d928c0.pdf?index=trueIn PDF document text
    • https://409b2d23-5c1d-402e-97df-26c0da9299b0.filesusr.com/ugd/2e3d42_f25012f31e1241708ff479b37c3fff83.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/cooling_gel_sheets_for_adults.pdfIn PDF document text
    • https://6739ca04-605d-4ff4-b4c9-4e5bd75a7819.filesusr.com/ugd/031dda_fa2f6d54a65e4da48893c27fc3f150dc.pdf?index=trueIn PDF document text
    • http://xuditameka.rf.gd/72842628825.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF020 5128 bytes
SHA-256: 936e61dc922535e85a0a03b4806bb81d01f40f22c59e147fcc2048516f65d3b4

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