Malicious PDF — malware analysis report

Static analysis result for SHA-256 67461003f7209a19…

MALICIOUS

PDF

137.1 KB Created: 2021-03-31 11:11:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 90c436df3576a46d31373bae6370a6b3 SHA-1: 2be8e4b62f04843e7e8b40f91f1b6d37431d29b5 SHA-256: 67461003f7209a19966184a99d62184441831c9687346731f99fc24224a1d0b6
134 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of multiple external URIs, including one with UTM parameters and another identified as a link farm on disposable hosting, strongly suggests a phishing or malware distribution attempt. The 'Urgency / deadline lure' heuristic further supports this, indicating the document's content is designed to prompt immediate user action.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/strik?utm_term=best+chess+app+for+android+2020 PDF link annotation
    • http://dsv-trening.ru/why_wont_my_excel_sheet_scroll_rightnbxoz.pdfIn PDF document text
    • http://deliwubavamir.mypressonline.com/xaduzopegataz.pdfIn PDF document text
    • https://cdn.sqhk.co/rorezina/AfHggtx/sakegiwimolijazugutoj.pdfIn PDF document text
    • https://cdn.sqhk.co/bujasugawo/yhnia8h/89167674914.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388813/normal_604ba3ca9fc81.pdfIn PDF document text
    • https://cdn.sqhk.co/kubafipefo/hhb2NtE/dotutimikafagapekuves.pdfIn PDF document text
    • http://sentytld.online/beko_washing_machine_6kg_1000rpm_manualvegrh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425506/normal_6009978971c33.pdfIn PDF document text
    • http://natikolom.site/draw_a_person_test_4_year_old0kdhk.pdfIn PDF document text
    • http://sogixusi.medianewsonline.com/cabala_portugues.pdfIn PDF document text
    • http://afracheat9.xyz/vocabulary_workshop_level_c_unit_3_answers_synonyms_and_antonymsdys0u.pdfIn PDF document text
    • http://vanimerukaguto.scienceontheweb.net/32596940560.pdfIn PDF document text
    • https://cdn.sqhk.co/fovuxugo/icggOiw/28335790748.pdfIn PDF document text
    • http://miraluvofizobe.medianewsonline.com/53399725439.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://uploads.strikinglycdn.com/files/9f3dadae-52b9-4fdf-96f2-3cc0798a20db/53466416067.pdfIn PDF document text
    • http://xafibejijopo.atwebpages.com/pubalop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f52d845-b959-42bb-8fa1-d965ad0ba935/adobe_photoshop_7.0_tutorials_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/92505284595.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/69095172096.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55cb1bcd-c9a7-45de-ab39-e1cfc141f656/how_to_call_facebook_business_support.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_off0001d084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D084 5324 bytes
SHA-256: 8cf6a517ee82270c5f6a44c038453edb445a585daaa4e0eb16679323033d705f
font_01_sfnt_off0001e291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E291 11340 bytes
SHA-256: 0f894d011fa59b3555a4861b775224a0741b39b71f991b6e4e2d1855d144c78c
font_02_sfnt_off0002089a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2089A 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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