Malicious PDF — malware analysis report

Static analysis result for SHA-256 565ab9a438a6b93f…

MALICIOUS

PDF

85.0 KB Created: 2021-07-04 12:04:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c788b198a50281dc82676bc0690adffb SHA-1: 1f0186bf4c01a7400aa0cfe6eb15e9d30115921f SHA-256: 565ab9a438a6b93f8de4ad0d13c757aac62fac66ab552b5ae0d8df1a95988adf
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. The document body is unreadable, but the heuristic findings and numerous extracted URLs confirm the link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d74cd9b72e9---39966185583.pdf In PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/7a7caf7529fa6e307c710edc564dfea8/32595777108.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/5d74a79fdffccecf4ac655125a5973f0/lijowumisiwafimi.pdfIn PDF document text
    • http://allycatering.com/userfiles/50393162766.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/22169709370.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b42a3fa8b43---3386607693.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/17d5fb798b7c0433eb672434b437176d/89730044668.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b187c060dd---53882930664.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/o9ph214mmt7fak56m11ima21p2/zezenixipajevorujevapa.pdfIn PDF document text
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/gowimujoveridaxuromuro.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/436kmpsgum4kqdnihje21k6c40/vukipejomipafazomosetafos.pdfIn PDF document text
    • https://playerpress.com/ckfinder/userfiles/files/21579480323.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a97cb3b0165---64850355041.pdfIn PDF document text
    • https://yuktogel.com/contents//files/tabuxididalawuzowuxatopi.pdfIn PDF document text
    • http://ssteelelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/40888056615.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/xulogafomizut.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/3l4t1fiucbkkl3g6o0ee7prd5p/70357629486.pdfIn PDF document text
    • http://4bx.pl/public/file/17011329804.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/bojapavojonopiseleza.pdfIn PDF document text
    • http://centroolosprato.it/userfiles/files/87252190344.pdfIn PDF document text
    • https://mumegram.com/userfiles/file/85894960267.pdfIn PDF document text
    • http://stewartreunion2020.com/clients/2/2a/2a0d9dcdd57715375c9f4393c24df0f2/File/69017896489.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/e250389d190d7039a73b475e80dec71d/23628176196.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=what+age+can+you+get+a+license+in+texasPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE792 17140 bytes
SHA-256: 3c49d14e8d221437054d19cc2e259f55697962cca7c048b02764f75bfc81d57e
font_01_sfnt_off00011430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11430 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C47 10716 bytes
SHA-256: 9ba7600e98b46cfb75a4d2e7fa10a93f090d1969caac57b65032a4f851f06a42

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