Malicious PDF — malware analysis report

Static analysis result for SHA-256 69944fb67d8e3c06…

MALICIOUS

PDF

75.8 KB Created: 2021-04-21 09:48:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a984d0826b7ef1448d1cca4d77e89f55 SHA-1: 2e33c499e21e0d27488f7918e0a455f1a9ebd24b SHA-256: 69944fb67d8e3c063549ed4da99427161cc790cf65e9ceb0c4badb969e643181
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

Heuristics 5

  • 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 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://jottigo.ru/strik?utm_term=intelliflo+variable+speed+pump+programming PDF link annotation
    • https://kuvikopar.weebly.com/uploads/1/3/4/8/134870245/wetiregafuzejevuzuxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407562/normal_600e7a5b13087.pdfIn PDF document text
    • http://midikakuvekume.mywebcommunity.org/how_much_does_david_beckham_worth.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455406/normal_5ffe99c05dec4.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxamomajil/wixhjem/rebasibafikebomivu.pdfIn PDF document text
    • http://dotixomovi.sportsontheweb.net/how_to_pass_a_drivers_test_in_texas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453902/normal_603a66c553f78.pdfIn PDF document text
    • http://chelamela.org/87944180921abohj.pdfIn PDF document text
    • http://interbankdigital.com/whirlpool_duet_dryer_manual_reset9l37x.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370740/normal_600617ba8e4d1.pdfIn PDF document text
    • http://usejus.club/project_manager_remote_jobs_india7qwlu.pdfIn PDF document text
    • http://spiritstudio.ru/light_brite_cube_refill_sheetsyl65e.pdfIn PDF document text
    • https://cdn.sqhk.co/kimejijomaki/ibieZlU/51789958104.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465941/normal_603f9ec7a780f.pdfIn PDF document text
    • http://torchland.xyz/sedupekawumusemaribid2ptem.pdfIn PDF document text
    • https://wiwanozamo.weebly.com/uploads/1/3/4/3/134306351/5224747.pdfIn PDF document text
    • http://neletaparufo.scienceontheweb.net/vuzunotos.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/guvovigo/rebazesemerujow.pdfIn PDF document text
    • http://nijarigu.onlinewebshop.net/waltz_of_the_flowers_violin_and_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/tobito/judodugobebufasu.pdfIn PDF document text
    • http://nokejufesuw.atwebpages.com/tejirowi.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_off0000e83a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE83A 5496 bytes
SHA-256: 302e9dab6512b49c84bc4aba931ec3347e53e6dd85359fbc535ea0eeb957b5d4
font_01_sfnt_off0000fadb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADB 11252 bytes
SHA-256: d251d661c14c773515ea82b6ebb139031f17a17c0f1cb83454e1a8c20092649b

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