Malicious PDF — malware analysis report

Static analysis result for SHA-256 f72803656df50bbb…

MALICIOUS

PDF

78.7 KB Created: 2021-05-05 19:15:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0e09cfcd3717c07fdcece244389fd1e9 SHA-1: 265484f6a2d2e036d424dbff1bca6121bff3a497 SHA-256: f72803656df50bbb16b4be674823a8461fdab6e1733724a195db091c62d6b8dd
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 0.9994

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 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://resalured.ru/strik?utm_term=como+terminar+um+relacionamento+toxico PDF link annotation
    • https://subafoxa.weebly.com/uploads/1/3/1/3/131379179/d13be9371a3da5.pdfIn PDF document text
    • https://livorenofog.weebly.com/uploads/1/3/1/1/131163774/puruvubifaru_zoxuxigazozuwe_dupesifukewewem_mutadurufab.pdfIn PDF document text
    • http://duwudivusupo.mygamesonline.org/jupefokumedivizewupabofek.pdfIn PDF document text
    • http://podarokinsta365.site/avg_zen_premium_apkqmn1m.pdfIn PDF document text
    • https://mowazaxof.weebly.com/uploads/1/3/4/7/134704653/91d66ee9cdbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471509/normal_601d58b73071d.pdfIn PDF document text
    • http://stonersfranchise.com/toyota_camry_2010_owners_manual568i3.pdfIn PDF document text
    • http://medgaj.com/bomux38kes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411503/normal_604980b259c2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479923/normal_6030fd4fec78a.pdfIn PDF document text
    • http://gtmedis.com/viruxijurakodiwaderexurund86eu.pdfIn PDF document text
    • https://cdn.sqhk.co/moxasapiwer/heWkwp5/parixe.pdfIn PDF document text
    • https://punafatig.weebly.com/uploads/1/3/1/4/131408139/3532498.pdfIn PDF document text
    • https://zunaxezosepoto.weebly.com/uploads/1/3/0/7/130739564/marulol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387420/normal_6005f14f2607a.pdfIn PDF document text
    • http://stavki-na-sport.site/tesemosapipefepll9ls.pdfIn PDF document text
    • https://cdn.sqhk.co/salobosemiv/fejchhh/56851828157.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/b2a6e2b7-3648-4513-a8b7-6427ea8d45d0/64822691580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6702ca4b-93ac-4711-a5f4-baf2d06315b2/workshop_practice_series.pdfIn PDF document text
    • http://gumomexad.onlinewebshop.net/11991090689.pdfIn PDF document text
    • http://vunonam.atwebpages.com/pneumatic_drives_system_design_modelling_and_control.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/349b0554-ce8b-478a-b8eb-77b9529f3b5b/dagegejosa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46cfab57-46ce-4d63-910d-651509017335/what_is_a_dystopian_genre.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A6 4740 bytes
SHA-256: 3eb0a7b00331b68bc44dc35895a1de06c7bf2b9267f6f6e3972b2f11e41cfdc7
font_01_sfnt_off000103a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A7 13084 bytes
SHA-256: c49f2c3cdbfe19e4b21257f5b8b1dc539942828cb38134cb00fb304df1aae278

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