Malicious PDF — malware analysis report

Static analysis result for SHA-256 b68eeb19b4eab6b5…

MALICIOUS

PDF

78.1 KB Created: 2021-09-17 12:02:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ed7d0bda82bb2cb0c0616c26b12e2dc2 SHA-1: 07010ca81c55bbeb0693264788dc28f116e10cc9 SHA-256: b68eeb19b4eab6b552eec4461a60e82d54722de89e6951899902d407b4edb952
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs that form a link farm, pointing to various domains, many of which appear to be disposable or compromised hosting. The primary function seems to be redirecting users to potentially malicious content, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 http://lightofislamonair.org/uploads/files/64185505135.pdf In PDF document text
    • http://ydyb.com/filespath/files/20210912130914.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/5732037619.pdfIn PDF document text
    • http://e-restauracion.com/app/webroot/files/uploads/files/92070705626.pdfIn PDF document text
    • http://ilsogno-bomboniere.com/userfiles/files/87782853614.pdfIn PDF document text
    • https://vcvscr.cz/www/www/fckphotos/file/56748628362.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/76ef83586551627ca22e74821ed7be7e/jijorap.pdfIn PDF document text
    • http://mskgroup-spb.ru/upload/file/dixewajubati.pdfIn PDF document text
    • http://lotusromeo.fr/app/webroot/files/userfiles/files/benurorekafamekuk.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/80916520551.pdfIn PDF document text
    • http://sqc.jp/user_data/editor/ckfinder/core/connector/php/upload/files/8245790949.pdfIn PDF document text
    • http://uniondrygoods.com/fckeditor/userfiles/file/80099164955.pdfIn PDF document text
    • http://camberwelltaxi.com/survey/userfiles/files/gulotigumasowuburojeneku.pdfIn PDF document text
    • http://studioschicchi.eu/userfiles/files/gatagasurozudotosonuwodet.pdfIn PDF document text
    • http://marmaraisg.com/images_upload/files/81050162203.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138960b1607e---73251545651.pdfIn PDF document text
    • https://ms01bet.com/contents/files/jolilapimo.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/e54697f5142ce89d66be1e1909dadab1/xuretowugidezanu.pdfIn PDF document text
    • http://fitviewer.biz/files/file/40171656740.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/2aa632b1ade6bd011c30638bb3940f93/1756258171.pdfIn PDF document text
    • https://funcarele.com/ckfinder/userfiles/files/35175997499.pdfIn PDF document text
    • http://uhy-th.com/image/upload/files/fagenaxaluf.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/r0kl07bntbpsn5no53mcs4f5o1/7649942672.pdfIn PDF document text
    • http://alwaditrading.com/userfiles/files/tuvet.pdfIn PDF document text
    • http://sdes.in/uploads/murixizavikuxurufurozowu.pdfIn PDF document text
    • http://chelseafoodmart.com/uploads/files/16426185764.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=science+vs+magic+mod+apkPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD9 18080 bytes
SHA-256: aaecd7bd7743af4366c4649cad2c3d2fc61941661858c438dda1bea78753ed8a
font_01_sfnt_off0000f987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF987 10848 bytes
SHA-256: 57b6c766c2800a7e4df3f42e84a50c4c8feb76fc41ca30f3dc35ddf6ff7d69a2
font_02_sfnt_off00011258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11258 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1