Malicious PDF — malware analysis report

Static analysis result for SHA-256 d032f856c5c308d6…

MALICIOUS

PDF

82.2 KB Created: 2021-09-03 23:48:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: dd396dd05f2d3555b012c84ff2c8ce55 SHA-1: 7d380ea02d1c5e5fb6a1c17b732c65a79e2487fb SHA-256: d032f856c5c308d671393754d020b2b052b7905098a5a8b900350e3a7764291d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress sites or disposable domains, indicating a link farm designed to lure users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or downloader campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://crewmak.ru/uplcv?utm_term=addzest+car+stereo+manual PDF link annotation
    • http://eca.or.th/ckfinder/userfiles/files/nizuwimamemuwagobuzosagap.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/46475512949.pdfIn PDF document text
    • http://bixenony.com/userfiles/files/68911467076.pdfIn PDF document text
    • http://solmoda.it/userfiles/files/vujidujesezorinivizogoz.pdfIn PDF document text
    • http://accronline.com/userfiles/file/legugekitenefegomexet.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/06601477db1b5500e5be88a1f7c9681c/wajavolevexajozolalem.pdfIn PDF document text
    • https://srmhospitalities.com/images/bulk_images/files/32950753362.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1735e8768---3052264538.pdfIn PDF document text
    • http://cementfeet.com/userfiles/file/38035437542.pdfIn PDF document text
    • http://skulpt.in/admin/uploads/file/kokakeselufinimikefofaje.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/727d8c7695dcdd7c49cad027053c07e9/19002802765.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/dovuputafodufabuxag.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/tofuw.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/eee8cfd6358572715e06aded5ea9d94d/maxakavafemerasometisan.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/53eb8d1af03c80d2a9df7be2e17fb603/xotawixad.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/92423100917.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/78isf0i7j0i837fo4lb0nnfk8i/duxim.pdfIn PDF document text
    • http://vote4dannybarry.com/clients/2/2f/2f5d4f67c16906f9b09010289963de11/File/19571310834.pdfIn PDF document text
    • http://medi-sen.com/files/files/66242702736.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/xodexedosizaxumij.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/64108347041.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a95484e3bf6---patagujofitekozoxas.pdfIn PDF document text
    • http://cristal-in.fr/userfiles/file/venezokesuromom.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160842797a09a0---moguxaweritodizolufefasos.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_off0000df0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0A 16964 bytes
SHA-256: 89755843c8810b0cd914fab759aac02ed3859162644c9362ccdeef5616e7d2da
font_01_sfnt_off00010ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD0 10580 bytes
SHA-256: 766c12626b7b0f51d4cd159367f7ce490c8eea7d7147628914b2c7ae37fd9bb3
font_02_sfnt_off0001230c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1230C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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