Malicious PDF — malware analysis report

Static analysis result for SHA-256 92c7d7f60a299294…

MALICIOUS

PDF

83.7 KB Created: 2021-08-18 15:43:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: f5f982c518d94106f7a90c8feb78d0f9 SHA-1: 77f007faa2996b07e2b972f1c580bc80383d27c7 SHA-256: 92c7d7f60a29929428198ea0e6302ec9823c66a2ce6a4ceaee3f1d2441306ff1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. The document body is unreadable, but the presence of these links strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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
  • 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 http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/192b396df1af85257c53bcaea3e4bff2/fegikesudemuzudofib.pdf In PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105f61e8ec94---tepujemabenigipi.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d29708b60---kuneduwewudotadi.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bde2697ec3---duxogezejitudobolonijiruj.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd772a8ebf---75001138616.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/92f708a22ac04f7e18b4d14d7de7aad0/80501285779.pdfIn PDF document text
    • http://msnladyboy.com/ckfinder/userfiles/files/65549485622.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba727faeb98---bewopi.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16081fecdad384---3982450379.pdfIn PDF document text
    • http://the100voicesofgospel.de/fichiers/newsletter/file/vikugibebitanolowaniwezun.pdfIn PDF document text
    • http://angerdress.store/ckfinder/userfiles/files/jedigo.pdfIn PDF document text
    • http://poorclarescork.ie/images/39379952917.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/4btfpmkalso1sps10ouhbpdtq5/33268908788.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160942af792156---20883831197.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/5f5973juqq9ckmht4eo9fceu15/42667937834.pdfIn PDF document text
    • http://mamnonkitty.com/webroot/img/posts/files/vipipik.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083513f78264---wevovomudusidude.pdfIn PDF document text
    • https://guineaservicesproviders.com/gsp/files/524565577.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/f2b308d5c406d06781c44d8eb8641897/mufiruwuzidawi.pdfIn PDF document text
    • http://hurtowniagrafit.pl/userfiles/file/53118801127.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/s9a9me0e69da0s8494et59e07n/kijupujuxufakefufa.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb760aa278---60930122548.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f45434a73---serenamodufimeradil.pdfIn PDF document text
    • https://ebooksweb.net/files/file/40633078440.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bd589f4dc16---selerawefebifaxaxatumoxiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=valores+normales+de+bicarbonato+en+sangrePDF link annotation
    • 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_off0000e193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE193 10820 bytes
SHA-256: f0a258de0b7599f6db42a139f8cb072b1c8d0eac7e5bf114294111076899e719
font_01_sfnt_off0000fa4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA4A 17928 bytes
SHA-256: 845e1f39c45522c087f4db8a5487412001b30bae49662b148aa94befdb83cc2a
font_02_sfnt_off0001279d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1279D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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