Malicious PDF — malware analysis report

Static analysis result for SHA-256 68ed58f61d6788bc…

MALICIOUS

PDF

82.2 KB Created: 2021-02-18 05:50:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 2fdfd366d41e495a109dd1f1fd409ebc SHA-1: 46f52b5cbf2a6df149b40d523613c91150b91cfd SHA-256: 68ed58f61d6788bc4a4a8372073a47d8068f6491ec2b06e75f6bd239dea147cf
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with the primary one being a lure for "Neopets magic shop restocking guide". The heuristic PDF_SEO_LINK_FARM indicates a mass of external PDF links, suggesting a link farm or SEO manipulation tactic. ClamAV detection as Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 further supports a malicious classification, likely involving phishing or credential harvesting through the linked sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=neopets+magic+shop+restocking+guide PDF link annotation
    • https://cdn.sqhk.co/gixekoji/vHNjgE1/general_mcinerney_newsmax.pdfIn PDF document text
    • https://cdn.sqhk.co/toxodimina/FjaH1gf/83665005451.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366408/normal_5ff36a126195b.pdfIn PDF document text
    • https://cdn.sqhk.co/wudenedu/BgibPAQ/43057156424.pdfIn PDF document text
    • https://cdn.sqhk.co/buvaboda/cWhbhgi/protect_the_girl_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369908/normal_5fd84c23460f6.pdfIn PDF document text
    • https://dakewamegiru.weebly.com/uploads/1/3/5/3/135305658/da2b996009.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501356/normal_5ffc52a80e08e.pdfIn PDF document text
    • https://likifovufuli.weebly.com/uploads/1/3/4/5/134588617/9041079.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418365/normal_6018a8d0e1b98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375694/normal_6014c82196c35.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/tirimofufemukat/android_one_s3_miracast.pdfIn PDF document text
    • http://jimanujomubil.epizy.com/xemutoxix.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/zutelasavobabegal.pdfIn PDF document text
    • http://totiwofosu.epizy.com/sql_server_2019_licensing_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/12463520573.pdfIn PDF document text
    • https://s3.amazonaws.com/neporezofov/xisemufiziv.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f81f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81F 5368 bytes
SHA-256: 4cdbf481f2e786d3c68405deab4b6c343e637b500b82aefbea064c6f13dfcd1b
font_01_sfnt_off00010a2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A2F 10240 bytes
SHA-256: 0a93d7b1012e34474633c33419e111feda8ffe39bd09109eaed11b4b08b225f0
font_02_sfnt_off00012d2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D2A 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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