Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c6aa308e316c22d…

MALICIOUS

PDF

74.8 KB Created: 2021-03-13 20:44:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0dfdf8e9368d65b2a043dc009859ba94 SHA-1: 2f14488e1f982961e7df8cf0584568eb6e788685 SHA-256: 3c6aa308e316c22da5d57585f4a59b4005b3d68777d3cc2fcbf3733108edc0ec
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms or phishing lures, with one prominent URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://lozipotod.ru/strik?utm_term=what+is+the+net+force+acting+on+the+wrecking+ball+if+the+cable+snaps PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4410211/normal_5fe2e948ea70e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383699/normal_5fec3d4fef218.pdfIn PDF document text
    • https://cdn.sqhk.co/xovikojux/iigedib/los_mejores_traductores_de_idiomas_portatiles.pdfIn PDF document text
    • https://cdn.sqhk.co/loxexafetivu/cvjbTjd/amazed_lyrics_and_chords.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472763/normal_601a9b7d1e240.pdfIn PDF document text
    • https://cdn.sqhk.co/pagozixupezi/ibhiupf/62003846232.pdfIn PDF document text
    • https://tizelizenofus.weebly.com/uploads/1/3/0/7/130740364/5263275.pdfIn PDF document text
    • https://cdn.sqhk.co/zosiwutu/ggifhjl/935372872.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414169/normal_5ff715a3ddc7a.pdfIn PDF document text
    • https://nunoperiv.weebly.com/uploads/1/3/1/8/131856708/9634338.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490722/normal_5ff508982a6c0.pdfIn PDF document text
    • https://cdn.sqhk.co/xapawavuma/9jahghh/61852460337.pdfIn PDF document text
    • https://cdn.sqhk.co/suvotoruwot/6Egjngc/funny_fortnite_animations_clean.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/damasipoxajevam.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/62459297331.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/witamunexire.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD752 2900 bytes
SHA-256: b3dfb2f2c41da7350fc3755141d2fd0ea5796bb125df25fec831093623ff73df
font_01_sfnt_off0000e195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE195 5588 bytes
SHA-256: 0eb3680369dc1f5891afce143d187db95fa82426a0b89e689800c3ab402b6586
font_02_sfnt_off0000f4ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AB 11244 bytes
SHA-256: bc0fd3eda493d5ef73610f7823c442844933eecd2bb46ecd7142ff1653432b6c

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