Malicious PDF — malware analysis report

Static analysis result for SHA-256 cba6ffdcf054fbbb…

MALICIOUS

PDF

83.0 KB Created: 2021-08-19 03:27:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d3c65996f54f7ad997db5ce7a23f55ee SHA-1: f883a77ceaca072f89eb1af7eb40a506681b65f4 SHA-256: cba6ffdcf054fbbb59b7162568dcf171aa50639ab57120eb69054c8923b8edb3
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' lure further supports the phishing or malware distribution objective.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://medvor.ru/uplcv?utm_term=chat+alternative+apk+free+download PDF link annotation
    • https://pasarantogel2.com/contents//files/24189601224.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160e41dde1ea6e---60009847225.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/52075998733.pdfIn PDF document text
    • https://aquatrustfina.com/userfiles/file/79273228033.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb739abbfe---9436790887.pdfIn PDF document text
    • http://nutranghongngoc.com/media/ftp/file/gomoxemazoxugoxusakeresut.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/qqtoj0kc50jsq7du27hlpg4sh4/ramisi.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/vn2fmacppn16a3d95pj6ejhed4/kemiwixefumeju.pdfIn PDF document text
    • https://valleyrestoration.net/home/apf/public_html/ckfinder/userfiles/files/40139864720.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/danawezimulorufi.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16086ab3be5271---24054481886.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/pitevikelezaguxajupepimo.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0132b611a0---39254618554.pdfIn PDF document text
    • https://0a3exp.com/upfiles/editor/files/40709189705.pdfIn PDF document text
    • http://qdjshg.com/files/file/27218106493.pdfIn PDF document text
    • https://aquamedicasatumare.ro/ckfinder/userfiles/files/zojavibel.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/nebuxopimoburimenem.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/34482981869.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/82769660511.pdfIn PDF document text
    • http://daimarconstrucciones.com/images/admin/file/94797519716.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821c1cb28bb---76003434089.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/bl1t1o15qejrck2njo8vi8van5/77173769318.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160926d6d18be3---ditoxi.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

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_off0000e142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE142 16880 bytes
SHA-256: d587278279fe44f0950123cd72d865694274760cbc4b097fcb6b275930dc3f56
font_01_sfnt_off00010d5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12573 10704 bytes
SHA-256: 51dd0d72ffdee3dc202c4664acd057158440f87113282f5e7d2f55fea0ab5852

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