Malicious PDF — malware analysis report

Static analysis result for SHA-256 32c0a0f92835a605…

MALICIOUS

PDF

83.2 KB Created: 2021-08-17 00:31:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6cdcf2fab430a82f9418915d74850533 SHA-1: e3303b44beb5bad2cd02971fdb093e9c8ff5a05c SHA-256: 32c0a0f92835a6055ae6685804dd71902bc5765f22ff61a7f94062992d4bf9c0
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely intended to redirect users to phishing or malware sites. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to lure users to external resources, aligning with phishing and credential harvesting tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/6506a7420351d9b34c778ef5302e60ee/togububona.pdf
    • http://jamessham.com/admin/usercontent/file/mevokiwizipubuxedu.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160acd090ef716---7105935258.pdf
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/0cebe3cc2f01efa618584421ddd4930d/6074773108.pdf
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/l11d45hu25h9gn7bqaqgf6ruc6/zaletewobotunuguxaxebuv.pdf
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/4e7e44146d5fff80d23d9c96e195d4b0/24851193431.pdf
    • http://pneusmarene.it/images/file/kowoxugura.pdf
    • http://younewstoday.com/task/userimages/file/xubegijogudazajezekab.pdf
    • https://almoheetmanpower.com/public_html/userfiles/file/volozataxiwikolobumej.pdf
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/f7d30f9bb9eea99456983a77278ff0b9/78114218321.pdf
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d9ab55023---63353940195.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/795f969bb76c515fefadce3514027a5a/lumif.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/bg04ogpk0qg4g2efpj7rtle9tq/46803812118.pdf
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/627db001f53a538177e1d1a5b15f953d/wesabidipozegimisujiz.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1606d628376511---betapewuwegedemade.pdf
    • http://bugskin.org/userfiles/file/tafupedon.pdf
    • http://ressourcengarten.de/azubi/userfiles/files/40051995844.pdf
    • http://wirheiraten.de/images/file/91027391492.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160c3e86b0a5e4---45952669746.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160858859cbf6c---gigukonerobixepewipe.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f1206b050fc---46940273112.pdf
    • http://alt-1c.ru/userfiles/file/borodarazebubifixotapu.pdf
    • https://hargagila.com/uploads/image/files/41877992652.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=sucedi%C3%B3+en+manhattan+pel%C3%ADcula+completa+en+espa%C3%B1ol+latino
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddb4.bin
420b0283abe1876794492860dbc1aa3d462f86e8c9843e7f66374faac71db5b3
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB4 11260 bytes
font_01_sfnt_off0000f755.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF755 16792 bytes
font_02_sfnt_off00010f67.bin
26885a5a6a9d71448244b8a26dec76c4c43691a00bf877eb2a656436bf654931
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F67 17552 bytes