Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bedea6efdc3f181…

MALICIOUS

PDF

59.9 KB Created: 2021-02-20 14:42:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 56ed7159903e465878b111fdc3954b96 SHA-1: c56b97350ae1104946ad56759ede99cfd7cc1a61 SHA-256: 9bedea6efdc3f181b534e3798d42ac140256ae87439498954928c9d7ce96bb36
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded URLs pointing to domains associated with phishing and malware distribution, specifically luring users with the promise of cracked software. The document body, though heavily obfuscated, suggests a theme related to software downloads.

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://seumenha.ru/wb?keyword=adobe%20photoshop%20cs5%20crack%20file%20free%20download PDF link annotation
    • https://cdn.sqhk.co/zotofoza/idgh4ja/88252506916.pdfIn PDF document text
    • http://afracheat4.xyz/27161533197x18sa.pdfIn PDF document text
    • https://cdn.sqhk.co/bimazizuxu/jihhdgf/tozobopigexewugamu.pdfIn PDF document text
    • https://cdn.sqhk.co/duponetix/c5k1Ehj/mod_menu_among_us_android_always_imposter.pdfIn PDF document text
    • http://nuveclovet.xyz/align_technology_stock_performance49edl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426822/normal_5fe2d3e895171.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456667/normal_600a456624371.pdfIn PDF document text
    • http://motivawka.online/florida_economic_loss_rule8h9he.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405652/normal_5fef5252298cc.pdfIn PDF document text
    • https://lasebotoxuxuxir.weebly.com/uploads/1/3/4/7/134729765/72a47500e496.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407994/normal_5fe39fc335b5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402956/normal_5fd61a1dcc20f.pdfIn PDF document text
    • https://nojemalof.weebly.com/uploads/1/3/0/8/130873850/latetirur-sofavejokekum-xunizomobe-febokipal.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/vofadoloves/87892375580.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/jokorusuwapabe.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/maniacs_2001_full_movie.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_off0000af62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF62 5652 bytes
SHA-256: d1a6c2ecaeb08100220100c15d367ebbd56637dec4cff2cdcbc5513cfb9bb052
font_01_sfnt_off0000c2b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2B1 9348 bytes
SHA-256: f641ffb816d1437ca13d882c72b0ecf534c134350a7e02250d7443d97482642f

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