Malicious PDF — malware analysis report

Static analysis result for SHA-256 176cc9225b3a998f…

MALICIOUS

PDF

108.0 KB Created: 2021-03-04 07:49:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 9ee64e0669101a0dd3042ac2a8ee9766 SHA-1: 56a6ecd8ad86ea0cda68e8706b257e0fed1aeeeb SHA-256: 176cc9225b3a998ff23fdbe0e2c1b0fe0a71a5dcf2d9c537e7d4d8afc07357f5
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, forming a link farm, and one URL is directly presented in the document body as a search query. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a scam. While no scripts were explicitly extracted, the PDF structure and extensive external links suggest it's designed to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

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://xezojetit.ru/wix?keyword=what+is+the+economic+impact+of+unequal+distribution+of+water+in+africa PDF link annotation
    • https://cdn.sqhk.co/tutabalero/XjcOMI6/dead_poets_society_wallpaper_tumblr.pdfIn PDF document text
    • https://cdn.sqhk.co/doxurozupu/mShfOhc/tap_counter_target_spell.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/Jieiigg/logo_quiz_answers_level_36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449968/normal_603c5e8dea067.pdfIn PDF document text
    • http://suziterunedoloj.sportsontheweb.net/gawasejugenopow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483337/normal_5fea0a4970108.pdfIn PDF document text
    • https://cdn.sqhk.co/pijovowifil/he0ihhg/jonolub.pdfIn PDF document text
    • https://cdn.sqhk.co/nonuripot/ZYGw1ro/harvest_church_riverside_pastor.pdfIn PDF document text
    • https://sewenafefu.weebly.com/uploads/1/3/4/0/134012434/457a8e3616b.pdfIn PDF document text
    • https://cdn.sqhk.co/lilokimoz/bTiaZYc/67535225842.pdfIn PDF document text
    • https://kefexogutifega.weebly.com/uploads/1/3/5/3/135309882/5710566.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486200/normal_6012dfd883088.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383573/normal_6019ff835c13d.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/ajjih7t/smith_s_money_center_hours_near_me.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zijiwaras.onlinewebshop.net/zixex.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_off0001624d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1624D 5764 bytes
SHA-256: 78b009131149f4de4028eacfc42e83d3210fc66ece7c9c81d7f8c5ca78a64187
font_01_sfnt_off000175d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175D4 13716 bytes
SHA-256: 84d624aa3a5e8a70e22e2e9cb1fe17f7d2c93bbac8194afb57581d4356854860

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