Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aafa188b351ee63…

MALICIOUS

PDF

124.0 KB Created: 2021-02-07 16:08:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 4e9b3d1db9db4de161219da2c33e0217 SHA-1: 9074b41c70d793eef092aca0be7999a4024e76f7 SHA-256: 4aafa188b351ee635557f2fdb94effb7d5b6784cd190f7416968aaa23b9e928d
224 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagging it as a brand-impersonation credential phishing lure for Amazon. It contains numerous external links, including one pointing to a redirector hosted on weebly.com, which is indicative of a phishing campaign. The presence of external URIs and the overall structure suggest it is designed to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 7

  • ClamAV: Pdf.Phishing.NoRobot072162-9875419-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.NoRobot072162-9875419-0
  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://bamegipizof.weebly.com/uploads/1/3/4/6/134647446/36400.pdf.
  • 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://jacksth.ru/wb?keyword=learn%20app%20development%20android%20free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377380/normal_601f76c0654e9.pdfIn PDF document text
    • https://bamegipizof.weebly.com/uploads/1/3/4/6/134647446/36400.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418972/normal_5fd64ad5e9044.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417536/normal_5fe0374c35734.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443608/normal_60176bc903b06.pdfIn PDF document text
    • https://cdn.sqhk.co/xenaporo/axji1hj/el_arte_de_la_guerra_maquiavelo_gratis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404290/normal_5ff527127bbe9.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/jufowokedunod/15461427171.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/3ds_games_rom_android.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/jkbose_datesheet_12th.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/uon_assignment_cover_sheet_word.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/eclipse_38_honing_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/quantico_season_episode_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/nitavuli.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_off0001ac22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC22 5012 bytes
SHA-256: c28ccc08cc63f20f63686cdfd29e183eb8cfb95b54588dac62b9da55cebf9028
font_01_sfnt_off0001bd27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD27 11248 bytes
SHA-256: ebd6c9e5813abc6ee4091a45a9676597b4b1813687652443b9f5177d21b831ab

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