Malicious PDF — malware analysis report

Static analysis result for SHA-256 e08f328d28b6f995…

MALICIOUS

PDF

111.1 KB Created: 2021-08-04 05:26:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f9228b288bc4b1c7b5a12c40830e396f SHA-1: 6f17eb8a2fa40590fee36c740448f44d1fccfb2e SHA-256: e08f328d28b6f9951e6fb21fc9e7d5486649a897a4fe7a65eba7fd55a6efe827
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to numerous compromised websites, likely intended to lure users into downloading further malicious content or submitting sensitive information. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://przedszkolenisko.pl/userfiles/file/76318164625.pdf
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160850e32c080e---gasepodegi.pdf
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/3ec5c6243392ce05274807fad7c2b081/17374686593.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160af716c7521b---93965600781.pdf
    • http://lamorenj.com/userfiles/files/7860684171.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf4d0ee770---febufali.pdf
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160fc8fb36ff84---56887759868.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef42ec4722---pemuwom.pdf
    • https://vicotelecom.vn/static/source/images/file/dotabuj.pdf
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/3d1b7116096174f793997df36f0ccbf3/20528668106.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16084cb2849cd2---5346377711.pdf
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/398c38455b114edf7b36fd78bffa225d/77339793310.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/0a161cdf0c3a998a4ac0a496f62f47cc/gemaraxolipoxubo.pdf
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/db12d191361909352464041cec28bd33/66013860764.pdf
    • http://diegogenna.it/userfiles/files/demef.pdf
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/dd932ded5a6e1e57ab0f03d2dc7f1d2b/koxetototazumupokaki.pdf
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f253064977---39048764149.pdf
    • https://mobilieroccasion.fr/uploads/file/lelupukukoke.pdf
    • http://canigrup.com/userfiles/file/96793060172.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160df92549aef8---wuwifidera.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=descargar+visual+fox+9.0+gratis+en+espa%C3%B1ol
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://adf.ly/pYzLQ
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001299e.bin
7edc5b1ecb960c15334e39d0139bc6848a1b8d613fc7a1364b88a5726836b629
pdf-font-stream PDF embedded font (sfnt) at offset 0x1299E 11484 bytes
font_01_sfnt_off000144b6.bin
163678c258d2da1969300b75d4fe4571f7bee842ba7630469f6a03f1d74eb974
pdf-font-stream PDF embedded font (sfnt) at offset 0x144B6 17460 bytes
font_02_sfnt_off00015f56.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15F56 16792 bytes
font_03_sfnt_off00017768.bin
089bd933b0be7baf9e864f90b05f216379a48920ad1f85c0cd8c3281f705806c
pdf-font-stream PDF embedded font (sfnt) at offset 0x17768 19648 bytes