Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c7181510225a719…

MALICIOUS

PDF

70.4 KB Created: 2021-03-07 12:37:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c3639782be9d54dfc90b8b7bdb657089 SHA-1: b6c15286e942522ed6a1c378942222ac44479db3 SHA-256: 7c7181510225a719bf9b950fa7d16952b35573e008e600de4e94b99da3b57472
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://zajinet.ru/wix?keyword=circulatory+system+word+search+worksheet+answers PDF link annotation
    • https://pogiwubuwafax.weebly.com/uploads/1/3/0/7/130775808/1587167.pdfIn PDF document text
    • https://xatevixi.weebly.com/uploads/1/3/4/6/134651360/xotekekukeva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473651/normal_601f53549f1ee.pdfIn PDF document text
    • https://zawoxabupuw.weebly.com/uploads/1/3/5/9/135990747/2842857.pdfIn PDF document text
    • https://kaperimivegorew.weebly.com/uploads/1/3/4/3/134371305/fukatijunezo-saxowitokemavez.pdfIn PDF document text
    • https://fidenuta.weebly.com/uploads/1/3/1/4/131454859/fusegejoxa_zonufajidufoti_sataga_dabadidexoja.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423166/normal_5fccbce347fe3.pdfIn PDF document text
    • https://gazasajud.weebly.com/uploads/1/3/4/8/134879445/bivejivavesevon.pdfIn PDF document text
    • https://ruvararet.weebly.com/uploads/1/3/1/3/131398095/binufogapavi.pdfIn PDF document text
    • https://polabobaxadujo.weebly.com/uploads/1/3/4/7/134775235/xazifonoweg_vuxojuximatuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414864/normal_6026d06582c0a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377704/normal_6005e4b2aa494.pdfIn PDF document text
    • https://vifejekim.weebly.com/uploads/1/3/5/3/135322606/fawokuwegijes-gizeru-lixat.pdfIn PDF document text
    • https://xoregofejaba.weebly.com/uploads/1/3/4/6/134651656/karevera.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422368/normal_5fe40412d51ca.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/86a41032-cd8b-4743-987c-2cf1b212e7ef/89177145016.pdfIn PDF document text
    • https://c1e7300b-80c0-415c-b28f-1ac330235641.filesusr.com/ugd/8b97dd_36da1528e1fe4d2e8051e5c881e8325a.pdf?index=trueIn PDF document text
    • https://a32e93c2-1aa3-4149-af29-aa5d163ab988.filesusr.com/ugd/40336e_efc28465ca4042cab92a85633af4fa74.pdf?index=trueIn PDF document text
    • https://f72b89be-0fa6-41ee-8162-331329ef78ce.filesusr.com/ugd/95089d_e7681a1a055b4fb2a7d73e972291edc0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ade21093-e201-4e60-9dd4-78a21a69cff0/the_wave_lottery_time.pdfIn PDF document text
    • https://52468903-0e2d-47c5-babb-61e1d305d291.filesusr.com/ugd/32777b_cb60841cda9e42d580a9fa68ef256115.pdf?index=trueIn 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_off0000d6c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C3 5344 bytes
SHA-256: e4394a92cf552c920e92baaa4d16ea9a64ea9c677910f9d996ff310c019145fb
font_01_sfnt_off0000e8d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D1 10152 bytes
SHA-256: c013603d1f5bdb4a3e4103e9a8ffce96232fffd1f945c39e69c5322f3a332dc8

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