Malicious PDF — malware analysis report

Static analysis result for SHA-256 a82c8f6877573806…

MALICIOUS

PDF

71.1 KB Created: 2020-12-19 06:50:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 49362c2cccd01ac98ab95ed3c9272e78 SHA-1: 9d14e3e105298e863a2b6cc1a0a21822bfe15ef3 SHA-256: a82c8f6877573806a4ef8c16f06a6a1135e262830c04ddc48131614dcb5e9e4c
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, with a critical heuristic flagging it as a PDF link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO abuse. No scripts were extracted, but the sheer volume of external links suggests a coordinated effort to distribute or monetize malicious content.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafftec.ru/strik?utm_term=geometric+formula+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4409811/normal_5fcf39fb62efa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481985/normal_5fad9f34e4bf9.pdfIn PDF document text
    • https://jiwadurator.weebly.com/uploads/1/3/0/7/130776405/kutanagewadixini.pdfIn PDF document text
    • https://worowisirokisid.weebly.com/uploads/1/3/4/8/134856274/fikuludif.pdfIn PDF document text
    • https://linuvovozesuv.weebly.com/uploads/1/3/4/7/134774252/9152700.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476766/normal_5fd0e500bbd34.pdfIn PDF document text
    • https://soxajerufoxizas.weebly.com/uploads/1/3/4/8/134880654/voxes_timitex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416494/normal_5fd143fdd0a98.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fdd39d2109152533653190d/t/5fdd440642c0045a33e0ab36/1608336390708/kepujariwasepukije.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5159b403f5353fdb09bdd/t/5fcb51de26a2be7f6de24718/1607160291516/10921342004.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dfe77d0c8f249d40ab54/t/5fcaea05a3bc3d1915240f02/1607133701934/tipemus.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/automation_game_free_full_version.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dd9fec917750a3d7b949/t/5fc3d636f81c9a2a0c178a9d/1606669878808/pathfinder_siege_of_stone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd0d4361-96c7-4411-baa0-83628871558d/winefarafigejefujokif.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cda4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA4 4932 bytes
SHA-256: a49534ccacd56d53eda7750daa19daef4cccf9bc5c3d2db4d13afa25d22549cf
font_01_sfnt_off0000de71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE71 10360 bytes
SHA-256: 89d7964ef3c2a0bc33360435d62e9348c214489163249bb8ec71c306f49b3b8f
font_02_sfnt_off000101b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B4 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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