Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b270e3378b409e1…

MALICIOUS

PDF

65.7 KB Created: 2020-11-11 15:41:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 72f4a8e01cb69194dbcc3fdbb44504fe SHA-1: ea7cab3eee844c317aa662c40a1dc0cffaad5ec3 SHA-256: 6b270e3378b409e1715a5dc266f8d058ce63c7485578d73fa1dd76df753139f6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical 'PDF_SEO_LINK_FARM' rule indicating a mass of external links, and a ClamAV detection for 'Pdf.Phishing.Trojan'. The embedded URLs suggest an attempt to redirect users to potentially malicious or deceptive websites, consistent with phishing or SEO spam tactics. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/123?utm_term=south+charleston+high+school+wb PDF link annotation
    • https://vixeroniwemeful.weebly.com/uploads/1/3/0/7/130740086/5536424.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366642/normal_5f9ff89dbea77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377912/normal_5f9d1c143f244.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368488/normal_5f9150992b347.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/biwuwukesazef/17102366853.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/bifobanuxoxinixuzufodox.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/60870723664.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/shared_powers_def.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d49bfefa-4e5f-49a0-8ed2-d50cb0f95781/kennedy_classification_rpd.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/cambridge_checkpoint_english_coursebook_7_free_download.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_off0000c26e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC26E 5396 bytes
SHA-256: 4b624d9313cb55e124892e3c1ae2d498feee24ad44081b43905521020f54b189
font_01_sfnt_off0000d4d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D5 11084 bytes
SHA-256: da0ca74022e4199868215e0a96e24f3b518189069cb8fc2aa3194d64d193a46a

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