Malicious PDF — malware analysis report

Static analysis result for SHA-256 93111eafb2cce890…

MALICIOUS

PDF

74.5 KB Created: 2021-06-05 21:38:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 65f2a9444a7750df2249d5702e5b9368 SHA-1: 335e5992189db5f2c49787e2b103bb7771a21c5f SHA-256: 93111eafb2cce8903332bf6937591ab15529f0c05d423e2c47200fde97a68825
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection, indicating malicious intent. The presence of numerous external URIs, many hosted on disposable domains or link farms, suggests a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains metadata related to drivers, likely serving as a lure to trick users into visiting these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ketchas.ru/pbw?utm_term=bluetooth+peripheral+device+driver+dell+latitude+e6430 PDF link annotation
    • https://dukidisivaturan.weebly.com/uploads/1/3/5/3/135311912/9588716.pdfIn PDF document text
    • https://xomivevisavuwog.weebly.com/uploads/1/3/4/8/134852088/lotavapoga_zewak_walarusuwidid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409110/normal_603b99d3f3eb9.pdfIn PDF document text
    • https://dugajivesunilo.weebly.com/uploads/1/3/4/8/134866737/108f82b40bae644.pdfIn PDF document text
    • https://nusutaligufobam.weebly.com/uploads/1/3/5/3/135393176/3723131.pdfIn PDF document text
    • https://nevajuto.weebly.com/uploads/1/3/2/6/132695651/ketuxuwe.pdfIn PDF document text
    • https://sajolunuweto.weebly.com/uploads/1/3/1/4/131407571/pomox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417815/normal_602fad3bee054.pdfIn PDF document text
    • https://rewojomivatal.weebly.com/uploads/1/3/5/3/135345623/06be6115.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388627/normal_60570688221f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375073/normal_603e163b23789.pdfIn PDF document text
    • https://kafutejitiripil.weebly.com/uploads/1/3/4/6/134625984/928482e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449177/normal_606bce4340282.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://foxobekizax.pbworks.com/w/file/fetch/144468297/lowebivotawixawelepax.pdfIn PDF document text
    • http://damopijos.pbworks.com/f/hearts_of_iron_4_millennium_dawn_wiki.pdfIn PDF document text
    • http://savavaze.pbworks.com/f/motalunoxowagedabagi.pdfIn PDF document text
    • http://sipibujewadu.pbworks.com/w/file/fetch/144495339/as_vantagens_de_ser_invisvel_legendado_assistir_online.pdfIn PDF document text
    • http://jolunatimavu.pbworks.com/w/file/fetch/144505494/ejercicios_con_el_presente_perfecto.pdfIn PDF document text
    • http://mudowomuxexo.pbworks.com/f/descargar_dragon_ball_z_budokai_tenkaichi_3_para_ps3_pkg.pdfIn PDF document text
    • http://midevodimu.pbworks.com/w/file/fetch/144454938/xijad.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_off0000d2a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A1 3304 bytes
SHA-256: 90b10d47cc11f8ea3fca6b8494c5dbb2a1c53db4b599f2b691f4ec43cf076072
font_01_sfnt_off0000de77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE77 5640 bytes
SHA-256: 7b0e93b9672e112604f20e9a19a5990db00645fd63927ef273a43800c90b6e11
font_02_sfnt_off0000f1a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A8 14084 bytes
SHA-256: 64790ae46207f635f2a2c90b700866dd4c1f21900e6c889f94e0cd7e9d6d4879

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