Malicious PDF — malware analysis report

Static analysis result for SHA-256 012c70dc2a524adf…

MALICIOUS

PDF

88.7 KB Created: 2021-09-04 15:57:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d40d9b4cddee1ff04b123ea6b5404586 SHA-1: 2eb3246590d41f67cc6248ba7d6ad94370c96ab0 SHA-256: 012c70dc2a524adf8318cd58447f9b4cec1a51cc77a6d4d57b0cdf821409c783
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the embedded URLs and link farm structure are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://smidgel.ru/uplcv?utm_term=2018+ford+explorer+manual+pdf PDF link annotation
    • http://tlproduct.com/userfiles/file/38150294072.pdfIn PDF document text
    • http://duonglaohanoi.com/userfiles/file/79926383091.pdfIn PDF document text
    • http://szkolka-wiercioch.pl/files/file/76420252137.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/ou0qtfpj765ch7f2sc7kplosl8/56601583133.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/161084cbdde990---pabagujuk.pdfIn PDF document text
    • http://millecolori.it/images/file/sinanufonukodowifi.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/8668ca48ce3a85d97647525ad3e077f5/71351296878.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/hc4tmjk59469h9545m9a0hrted/57994565785.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/ohos46djjdo11dopogs4vpee71/rowatisigiwojena.pdfIn PDF document text
    • http://uralinteh.com/uploads/files/lapujopokugimopupakipi.pdfIn PDF document text
    • http://renovator.cz/files/file/8001098353.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd2fb1af2a---34897322316.pdfIn PDF document text
    • http://synphabase.ch/upload/file/8973317368.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/6q07090f3uahukof08323fe0hq/71633541106.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/lijoxetaremabazutobud.pdfIn PDF document text
    • http://saigondome.com/uploads/userfiles/file/38108850121.pdfIn PDF document text
    • http://pho32shabu.com/uploads/files/jinibojesigovujatu.pdfIn PDF document text
    • https://computerzone.pk/file/lomemekovuzugonalopime.pdfIn PDF document text
    • http://backyardreleaf.ca/clients/6/6a/6a4eaaf8452764cb6fc14c9064ed0c71/File/rezulerudiginekidagawil.pdfIn PDF document text
    • http://andreaslasnik.com/data/files/12178948429.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f49ed43b2---tuxiwoziwedutogifes.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/10038ffd2b20839aeb0e6d3bc17dfcd9/vivawibababagis.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/4244e64a79dfa05096253b34408c2d44/jivokivuzi.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/3348185c9e3e08e640990a5d0715abda/muxelogasubomukisok.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f35c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35C 10908 bytes
SHA-256: e2c66778ecc19d41d06d4506bd5f50ea1bf70de6adadac4573a7a9c4f4ea3ca4
font_01_sfnt_off00010ca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA1 18592 bytes
SHA-256: 062fcb2b7864654aeee05f714f4733986fc02d1b33f4b6f95a7fb94fe2d5fb4d
font_02_sfnt_off00013cf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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