Malicious PDF — malware analysis report

Static analysis result for SHA-256 38b14f1cec76e791…

MALICIOUS

PDF

68.8 KB Created: 2020-12-07 17:05:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d4e3b9507aae063ccb9242e3d327cdb4 SHA-1: 273c2ce1c050f558e901d95fca0cceee77079a47 SHA-256: 38b14f1cec76e791f5b3ce3c610f4681c87c6a14ad2851824e70850b0b115c02
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

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://trafffi.ru/123?utm_term=sweet+home+alabama+guitar+tab+chords PDF link annotation
    • https://rotuvose.weebly.com/uploads/1/3/4/8/134849004/vovede.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392877/normal_5fc779aa2fc01.pdfIn PDF document text
    • https://wogilaxafa.weebly.com/uploads/1/3/4/4/134479860/3430982.pdfIn PDF document text
    • https://semovililuf.weebly.com/uploads/1/3/4/4/134476677/5265437.pdfIn PDF document text
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/9afa3facd.pdfIn PDF document text
    • https://mogezisatizate.weebly.com/uploads/1/3/0/7/130775403/sevomujenus-zakefikuwug-jefatetoda.pdfIn PDF document text
    • https://ralikinu.weebly.com/uploads/1/3/4/8/134883141/dazome-gotutijubudeku.pdfIn PDF document text
    • https://rusepokobedog.weebly.com/uploads/1/3/4/3/134366979/1887178.pdfIn PDF document text
    • https://nadaxobolimige.weebly.com/uploads/1/3/4/3/134365666/demiketodalelaj_wefadajixitoduk_pojezetusa_fikuw.pdfIn PDF document text
    • https://xisegebimir.weebly.com/uploads/1/3/4/3/134340076/6559805.pdfIn PDF document text
    • https://lixevipilevorox.weebly.com/uploads/1/3/4/6/134634278/wapol.pdfIn PDF document text
    • https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/6382999.pdfIn PDF document text
    • https://pamonufurudanes.weebly.com/uploads/1/3/4/6/134621962/wutilegulof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423454/normal_5fb823bea987b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc194132cf09257bd70d589/t/5fc4effdf3de5e49b50022e5/1606742014314/elm_creek_public_schools.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0cbc7c6d964583621a279/t/5fc1241ecb3e0f5771784d90/1606493216522/pemozebajab.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0CE 5688 bytes
SHA-256: f030bdc76e5233ba8954021f344015c31190f939c6bca3a083d2d01dd163e9bf
font_01_sfnt_off0000e405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE405 9916 bytes
SHA-256: 28b672b39ea5aa942487d92af599df94679a9c9a5c0b60d3123c3a0fffed1d6c

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