Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d360006d2627010…

MALICIOUS

PDF

64.0 KB Created: 2021-02-25 18:23:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 0eac0697bcf116e8f031988b35507d9d SHA-1: 9b7cb645d9b34d772fb022a03b4293ac38dc2120 SHA-256: 3d360006d26270106d3b6de0fcd9ca2359922472c507708eb03858df91dc0c81
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to 'druttle.ru/award', suggesting a lure for phishing or malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for multiple links, further supporting a malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9687

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://druttle.ru/award?keyword=national+boat+liquidators+annapolis PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5fda027a89f64.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473632/normal_5ff585d980ad6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427506/normal_60043ec153c14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467927/normal_60239c7646529.pdfIn PDF document text
    • http://wipalogazagak.22web.org/what_is_standard_form_categorical_syllogism.pdfIn PDF document text
    • http://fisareboveda.getenjoyment.net/management_skills_assessment_questionnaire.pdfIn PDF document text
    • http://wezenilokiwuv.iblogger.org/gadipawebukebamiwox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458125/normal_60174a5345c0e.pdfIn PDF document text
    • http://doxalasi.mywebcommunity.org/virus_meets_granny_shawl_tutorial.pdfIn PDF document text
    • http://ziwigosopijulal.mygamesonline.org/71959721734.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tomafidom.rf.gd/bizasutojax.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/tumizipetiniromifikikufa.pdfIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/50375186324.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/ramawidalonuwovonemijazom.pdfIn PDF document text
    • http://fukasutatota.rf.gd/21036217995.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/60194770103.pdfIn 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_off0000c9fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9FB 5188 bytes
SHA-256: 1ba70d1c80ab4ff4077e1159a6ee7c21f2d44544a09200b2cf7dc69ab2b8c6e8
font_01_sfnt_off0000dba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA6 10296 bytes
SHA-256: cc29827eef333a8da261e9ab33ef0f19e2feefc179a50bc92ae08e0bb80baafd

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