Malicious PDF — malware analysis report

Static analysis result for SHA-256 7463de0f54e3d56d…

MALICIOUS

PDF

70.2 KB Created: 2021-01-17 15:36:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3fb3943e99ebbd891c9b51a1693b1cea SHA-1: 5cea73dc507905afffebace73f3f11908fca995f SHA-256: 7463de0f54e3d56d34bdb4cd9d8c900b4411ded2c8785df71cd5f296c5c646ea
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, including a link farm heuristic firing, suggesting an attempt to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to exploit users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://trafffe.ru/aws?utm_term=employee+satisfaction+survey+template+uk PDF link annotation
    • https://cdn.sqhk.co/pujapipiwat/rifhijc/mod_xans_virus_apk_unlimited_coins.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369936/normal_5fbabd25c0789.pdfIn PDF document text
    • https://cdn.sqhk.co/bedogipaxog/4EgdTlo/samamigamubopizotomigonuf.pdfIn PDF document text
    • https://cdn.sqhk.co/danexili/jifNzmm/gewafekujekesekonumun.pdfIn PDF document text
    • http://rujajabejeveto.66ghz.com/22575306451.pdfIn PDF document text
    • http://fojozefamofu.22web.org/42813646561.pdfIn PDF document text
    • https://xetetikagidol.weebly.com/uploads/1/3/5/3/135308020/pegirodowes.pdfIn PDF document text
    • https://cdn.sqhk.co/tewokozogop/akWgdjb/basket_and_ball_2_unblocked.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/minabiwa/83684955111.pdfIn PDF document text
    • http://fufezexu.epizy.com/earthquake_reports_san_diego.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/37230487539.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/52531565607.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/sikedabazudukewowaxobebo.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/66920037540.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/tripadvisor_las_vegas_trip_reports.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_off0000d570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD570 5344 bytes
SHA-256: 4c2a7216a03cc281475b794efe109423f1c5d73f4c6eadf726f243306f66d3fe
font_01_sfnt_off0000e79a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79A 10768 bytes
SHA-256: 9f1a6837492597993f7654de47dcadc0d50e89bfa1f93f0d0ed930cccc0f4a29

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