Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fae438b6a2e4705…

MALICIOUS

PDF

70.4 KB Created: 2021-05-05 11:40:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 72538aeec0655ac96c4ec0ac68ab9de1 SHA-1: 1984dee5d496fe36da63795ea85ae1befcc6ac3e SHA-256: 5fae438b6a2e4705b56defba58314567e871a6447343eccaf265c0e4fdcb631a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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
  • 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://lozipotod.ru/strik?utm_term=2012+kenworth+t800+parts+catalog PDF link annotation
    • https://cdn.sqhk.co/zevinikiwi/ewvdHlF/defender_guard_app.pdfIn PDF document text
    • http://return-0.com/nordictrack_commercial_1500_treadmill_reviewyufv8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471960/normal_6019a5b5b4b0d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457318/normal_60081712afa70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404969/normal_605e02f2ce741.pdfIn PDF document text
    • http://uspeh.icu/826925855128olwy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377120/normal_6006109fde4ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368752/normal_603593a71b90a.pdfIn PDF document text
    • https://cdn.sqhk.co/fojilude/jifgdFC/lobster_trap_restaurant_colorado_springs.pdfIn PDF document text
    • http://lanejaselisipu.22web.org/is_ruger_sr9_a_good_gun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451755/normal_605a9787ac36d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389352/normal_602473ee90234.pdfIn PDF document text
    • https://cdn.sqhk.co/telupiza/i4hjiap/40440576133.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385437/normal_5fed193d1ebed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475741/normal_600121197104a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aee2702-9784-4657-831f-4c26dda6025c/razufaro.pdfIn PDF document text
    • http://zefupolegemawak.rf.gd/portrait_drawing_artists_near_me.pdfIn PDF document text
    • http://tinijev.epizy.com/how_much_does_an_electrical_engineer_make_in_dubai.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75f10fba-73f7-46b6-af28-4a6965cf8ca7/larin_3_ton_floor_jack_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/878e2177-ab51-4173-ab0b-b7df4c306ffd/xarutibafadane.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a218064-0676-4f41-904d-4317643474cd/bidijisijotimetetiluriwa.pdfIn PDF document text
    • http://zosutifajo.rf.gd/funitikoxoxigek.pdfIn PDF document text
    • http://luxizetugo.epizy.com/gewejixawur.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_off0000d50f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD50F 5776 bytes
SHA-256: a3dee4ce7a49f95f8783a535f992691017f01935fe2ad37284d1b784b8e4634c
font_01_sfnt_off0000e8d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D6 10388 bytes
SHA-256: 44ce44f7566ef02337743e8c8b06502b596c34f8fd9fb20cc280437f77cb5865

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