Malicious PDF — malware analysis report

Static analysis result for SHA-256 126f5aad5090a439…

MALICIOUS

PDF

86.1 KB Created: 2021-06-10 03:00:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4f49a831f617495178ef605846012250 SHA-1: 66c8d89711a96097e59906a2f9580989f362edb2 SHA-256: 126f5aad5090a4398e24b8e99cc2bb88e3805e3b0a8959bb0daffe23579bfa56
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external links, many hosted on disposable domains, suggesting an attempt to redirect users to malicious content or phishing sites. The document body, though heavily obfuscated, contains text related to 'kinetic typography lyric video template', likely a lure to entice clicks on the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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
  • 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://midufefew.ru/123?utm_term=kinetic+typography+lyric+video+template PDF link annotation
    • https://zezojafoxivofed.weebly.com/uploads/1/3/4/5/134528913/2926950.pdfIn PDF document text
    • https://xuzonikafu.weebly.com/uploads/1/3/5/3/135351414/be1751846e5e6d.pdfIn PDF document text
    • https://rubuvewoxuvima.weebly.com/uploads/1/3/4/8/134873715/d430892285.pdfIn PDF document text
    • https://pamumigupoxip.weebly.com/uploads/1/3/4/6/134614169/3be9e71220d326.pdfIn PDF document text
    • https://pomujitumigo.weebly.com/uploads/1/3/1/8/131857402/verelov_labadoxo.pdfIn PDF document text
    • https://boraweterepin.weebly.com/uploads/1/3/4/8/134864111/1bd9c16.pdfIn PDF document text
    • https://ruminugovukaka.weebly.com/uploads/1/3/0/7/130740017/8976523.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444374/normal_60c13e0cddfd1.pdfIn PDF document text
    • https://xilapisozigiv.weebly.com/uploads/1/3/4/3/134341565/sumelepivoli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459785/normal_60523f2a088bc.pdfIn PDF document text
    • https://nurerimufiwovu.weebly.com/uploads/1/3/4/3/134394752/54b946cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485161/normal_5fc5843585cd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402963/normal_6016e1e8c4cf7.pdfIn PDF document text
    • https://xinejusitap.weebly.com/uploads/1/3/4/6/134630468/rafetenizujev-joguwajos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zusemivak.pbworks.com/w/file/fetch/144954057/dupepimifegitibewubuw.pdfIn PDF document text
    • http://jorowad.pbworks.com/f/nusemosawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80b2d259-09de-4f22-9a0e-2b710fcc4452/mefelotud.pdfIn PDF document text
    • http://xawaren.pbworks.com/w/file/fetch/144418629/baofeng_uv-5r_legal_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8519fca4-9a97-4d88-8918-931fd9d954b2/duvezamevisanubi.pdfIn PDF document text
    • http://vafobotigef.pbworks.com/w/file/fetch/144526563/gebufujiduwozuletifubuke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50a6de7c-4e97-4523-9158-71724ed29b32/should_earth_be_capitalized.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000111f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F3 5440 bytes
SHA-256: a310aeb319865a58f3b490d8df6f160898f10fe723a0dceebc102006779e3af0
font_01_sfnt_off00012461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12461 11324 bytes
SHA-256: 72cbeb70da985e1d828639e871b0038a9192680ac5f634eb8fd00fcf78b569f9