Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6470a0a46d14d80…

MALICIOUS

PDF

68.9 KB Created: 2021-07-03 22:02:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 257e47e011bb813ba623fb24dda708a7 SHA-1: 6f409a609fe69d18022dc1d6aeaedddbb8636a84 SHA-256: d6470a0a46d14d807ffd176a5d4e26831e1172bcb56c3cfa8c0b89d67b670112
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing lure. It contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The PDF_IMAGE_LURE heuristic indicates it's likely an image-based document designed to obscure clickable links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://garglob.ru/uplcv?utm_term=niall+horan+and+holly+scally
    • http://cana.vn/uploads/userfiles/file/55684721202.pdf
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/bc9ac9d5cc487bf21ddbc7ed2643c2bb/8588168015.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f56122bd2d---zexudepala.pdf
    • http://onlineexpert.in/userfiles/file/6631291512.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/16074273a13907---12894450069.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c41a30d4d19---texep.pdf
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/685456f336702a0059723558bac07353/74730859272.pdf
    • https://ntct.dz/ckfinder/userfiles/files/panalevejamedekuga.pdf
    • http://emotionpicturesfestival.gr/userfiles/file/perikowirawajem.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/9c243be82a6a4900563811eabe92e999/59616262427.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0a32262b9---gojukosupaxis.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c4c902096---zenos.pdf
    • https://edbcagliari.it/file/6723684564.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aadf2de344c---83847938103.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/33d3c864e504611767fc6afaa6b718b3/45109270634.pdf
    • https://vayamcs.com/content_files/files/98865752682.pdf
    • http://adamlegal.com/userfiles/file/58802104341.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c1448b696e9---22171770212.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3ede453b01---5259983620.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a28557f3ede---28424328794.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160727c56bf8d8---soxizur.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de73abc6098---51776946615.pdf
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/98bcca0bfe3709cac4eaa065e2f09508/665353994.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160de1823bbf27---jadaxemirelapaf.pdf
    • https://stijsr.com/userfiles/file/89650355587.pdf
    • https://angelsforwarriors.org/userfiles/files/zomaketepifamo.pdf
    • 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_off0000b4f6.bin
6ecb323da48b235d3f3b868ccad3954bad567ac7998f1b616c56d978ee7bdbec
pdf-font-stream PDF embedded font (sfnt) at offset 0xB4F6 10328 bytes
font_01_sfnt_off0000cc20.bin
c69ea4c30e33c89bd65f174d7a453e6155e5dc9bf7e61b4381f9aa0f66094c96
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC20 13852 bytes
font_02_sfnt_off0000ee4b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4B 16792 bytes