Malicious PDF — malware analysis report

Static analysis result for SHA-256 62708639b4019656…

MALICIOUS

PDF

124.7 KB Created: 2021-01-05 21:05:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e3bbcc1e6fea88bc822b31a5b13c9769 SHA-1: 1c8c810744d633b373a91b9536df551a277500fd SHA-256: 62708639b401965613104522e0ecb569d636b52f10e3e86644dfc39ebb3da9a1
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many hosted on disposable domains, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or SEO spam. The embedded URLs and the structure of the PDF point towards an attempt to redirect users to potentially harmful content.

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://traffine.ru/123?utm_term=vizio+d39hn-d0+manual PDF link annotation
    • https://vururera.weebly.com/uploads/1/3/4/4/134493513/razufota.pdfIn PDF document text
    • https://zegikawa.weebly.com/uploads/1/3/4/6/134640481/5744558.pdfIn PDF document text
    • https://cdn.sqhk.co/nedupugifuka/3UtSjhD/38491982738.pdfIn PDF document text
    • https://bumatiwake.weebly.com/uploads/1/3/4/0/134096698/wavurixusepuseveje.pdfIn PDF document text
    • https://cdn.sqhk.co/lewulula/fjer64E/smart_youtube_tv_apk_download_new_version.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468550/normal_5fe46df1d039b.pdfIn PDF document text
    • https://doxefifuz.weebly.com/uploads/1/3/0/9/130969363/wogipibixerifazupuvu.pdfIn PDF document text
    • https://miniroworopan.weebly.com/uploads/1/3/4/4/134444940/dekoderasugati.pdfIn PDF document text
    • https://cdn.sqhk.co/japokaxe/gifijeI/agl_energy_plans.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://s3.amazonaws.com/vovabagubajegeb/daletunemosuputepo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b2d84f4-1a79-4013-a781-0898e1e35172/marvel_legends_nightcrawler_gamestop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0179dae-d42e-4274-9327-f1c56a68ac39/gloomhaven_mindthief_cards.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/83530156397.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_off0001a1b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A1B6 4984 bytes
SHA-256: 0eb2c42fcd5b3955ea9b746de7cb300cd3f51a52834bc2c37d07df1238920b6f
font_01_sfnt_off0001b27c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B27C 10944 bytes
SHA-256: d2306613d2bcb6a6d9a2c95efb74c4124d1b862ed32ca2591b493fcf0b812902
font_02_sfnt_off0001d77f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D77F 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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