Malicious PDF — malware analysis report

Static analysis result for SHA-256 b96f83cf1d620baf…

MALICIOUS

PDF

71.7 KB Created: 2021-03-16 22:09:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3a5e4ee2f5130f5ac5556e88d4954110 SHA-1: 82a41fffe3d5ff7fc5c8ab46c0feeacfab3ae82e SHA-256: b96f83cf1d620baff4f3fafee8e4f275597ef279b254e78f173a001c025479c1
126 Risk Score

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 0.9995

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://gimoguvi.ru/wix?keyword=target+mission+viejo+north PDF link annotation
    • http://buylettersonline.com/30279604105zigpu.pdfIn PDF document text
    • http://vomoliba.scienceontheweb.net/62863569540.pdfIn PDF document text
    • http://medtechnika1.ru/fopaxoresukubonibufijirfk80u.pdfIn PDF document text
    • http://zixaxagewan.mypressonline.com/aurora_rising_espaol.pdfIn PDF document text
    • http://wisatemubudu.medianewsonline.com/what_happened_at_the_overlook_hotel_before_the_shining.pdfIn PDF document text
    • https://tetagusupawuwag.weebly.com/uploads/1/3/4/5/134586179/775d9dbd69.pdfIn PDF document text
    • https://nokaxogu.weebly.com/uploads/1/3/4/5/134520383/f55501de1282d9.pdfIn PDF document text
    • http://priz24.site/how_to_repair_a_leaking_hot_tub_jetriaie.pdfIn PDF document text
    • http://sale20.site/95741533580qqczz.pdfIn PDF document text
    • http://sumodena.getenjoyment.net/67118324028.pdfIn PDF document text
    • http://ingmijn.com/56419747290hme3g.pdfIn PDF document text
    • https://lilalosemojuwo.weebly.com/uploads/1/3/0/8/130814601/7411604.pdfIn PDF document text
    • http://xejopegig.mypressonline.com/bolens_parts_uk.pdfIn PDF document text
    • http://auth02mobility.com/como_obtener_ttulo_de_propiedad_en_mxicom46tp.pdfIn PDF document text
    • http://vozajomaralamer.mygamesonline.org/24543563737.pdfIn PDF document text
    • https://muzezibabut.weebly.com/uploads/1/3/0/7/130739211/vipizivetes.pdfIn PDF document text
    • http://repair-monokoles.ru/wesiwulozemazobot7uy0e.pdfIn PDF document text
    • http://love-cosmetics.shop/wiwetejonubuwofajobo9gbsh.pdfIn PDF document text
    • https://telogedibosujo.weebly.com/uploads/1/3/1/4/131438044/minuriwowube.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
    • http://vepilezora.epizy.com/73378789814.pdfIn PDF document text
    • http://zutugidod.onlinewebshop.net/tafavudedoniloxurukofili.pdfIn PDF document text
    • http://vogonadebemumox.epizy.com/43471574314.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_off0000cd6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6D 4940 bytes
SHA-256: c9b9b5d3fa21f1eb102ceeafe5b6ff5228927717a79617450aa1e43f388f054f
font_01_sfnt_off0000de0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0F 10520 bytes
SHA-256: 802e9765e6be0defcf5c48cabeeb8d44f78b9cf8b6b13cb74aee9b2a5a9d12ed
font_02_sfnt_off000101bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BD 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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