Malicious PDF — malware analysis report

Static analysis result for SHA-256 073635600fc602fb…

MALICIOUS

PDF

113.8 KB Created: 2021-03-01 05:31:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 2d4f1e3fa221bc5db68c0a3045ca8552 SHA-1: b2912e51a829e0a85c809a1072d6ff13e6e87700 SHA-256: 073635600fc602fb6f5ad3edef9e5da38a9e589f23d6739b35736bba9dfa5ae6
134 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically pointing to a domain associated with phishing lures ('resalured.ru'). The 'SE_URGENCY_LURE' heuristic indicates the document uses deceptive language to prompt user action. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://resalured.ru/award?keyword=math+magic+tricks+books+in+hindi PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4401525/normal_5ff1971ce6129.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492918/normal_6025bedea1140.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496586/normal_5ff59be8937aa.pdfIn PDF document text
    • http://smm-target.ru/free_tatting_patterns_jewelry12r02.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366011/normal_60053eb3b4801.pdfIn PDF document text
    • https://cdn.sqhk.co/jabuvilir/Xjehjsb/keesler_fcu_mobile_al.pdfIn PDF document text
    • http://mon-compte-cmb.best/1896500028czexk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390366/normal_5fe24421723ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500453/normal_5fef13e7c2564.pdfIn PDF document text
    • http://7lessons.site/text_to_image_python7yqn4.pdfIn PDF document text
    • http://ita-women.space/79969128209lt800.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/tosevud/45252916079.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/susajewutifuvuxijuxuguvel.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/wulufuxuzorefu.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/free_nfl_fantasy_draft_guide.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000178a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178A8 5532 bytes
SHA-256: 0a74804c69f2a3b3a7ae5f7f83cfe56574b7c0594540929a4cbfa4aa2db2c421
font_01_sfnt_off00018b52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B52 14728 bytes
SHA-256: acdeed3a6c71edba761b1178f4e64cb2ad500eed9af8411da3cceb998707e128

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