Malicious PDF — malware analysis report

Static analysis result for SHA-256 3133d04a70b62c9a…

MALICIOUS

PDF

76.9 KB Created: 2021-04-10 16:23:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2318e14af406d0bbacb87de1df44ff6f SHA-1: 59c4a31056b9f732a3a35277ee6576ca4dac3b09 SHA-256: 3133d04a70b62c9af620faa0c9f44318473352394d0bfddc609cd7961f22ead1
156 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 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://kuzutuzo.ru/strik?utm_term=sugar+daddy+blues+song PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4457881/normal_5fe639e51ac11.pdfIn PDF document text
    • https://rizomoxus.weebly.com/uploads/1/3/4/5/134589692/makidizagidor_tupagad_fesibage.pdfIn PDF document text
    • http://xuzoxozi.22web.org/assessing_fitness_to_drive_guidelines_tasmania.pdfIn PDF document text
    • http://vigastlens.xyz/foxaguvedegarozq99z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413465/normal_602b60846b845.pdfIn PDF document text
    • http://onlinetiser.website/farufik3x9te.pdfIn PDF document text
    • http://bossyonlinex.com/equation_of_a_circle_word_problems_worksheet912cu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486053/normal_5fdb2d2498e74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468553/normal_604796e577b44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479917/normal_60380e9c6d7c2.pdfIn PDF document text
    • https://vusugurubem.weebly.com/uploads/1/3/0/9/130969976/6461903.pdfIn PDF document text
    • http://spoonnumberone.xyz/softonic_for_windowsgo4lj.pdfIn PDF document text
    • https://nuwoveforu.weebly.com/uploads/1/3/4/0/134099073/rixewebut-zojaj-tosuwa.pdfIn PDF document text
    • http://mejarada.iblogger.org/nakozofexug.pdfIn PDF document text
    • https://kogezuzoxato.weebly.com/uploads/1/3/1/0/131070880/fodoliluxuvuj_dobavileg_mowapudabavij.pdfIn PDF document text
    • https://xibatelilon.weebly.com/uploads/1/3/1/6/131637149/6590b49a702e.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/jajoxulabojaso/codingbat_answers_python.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/55041318241.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/pujukumeligak.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/can_two_players_play_spades.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/pugavukumewazise.pdfIn PDF document text
    • https://s3.amazonaws.com/timituvupame/rufidunatilitusoxomop.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/33890966318.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_off0000efbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBD 5340 bytes
SHA-256: 29d332cf0889d93c7d2790b35e3e77586f1b860cdddb33b0fb444283425ff2ff
font_01_sfnt_off000101f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F1 10828 bytes
SHA-256: df0a48408442f9f32be4264bb038f48780dfb148011e2aafc86863e3eb065eca

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