Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f3480387785a1ee…

MALICIOUS

PDF

110.5 KB Created: 2021-07-07 12:21:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 116f16dd60f905c2d601f57963531ce1 SHA-1: 29793d8348a16c2ee7d809d59c18cdae07ff3ed1 SHA-256: 4f3480387785a1eefa91ae5683786e32c231e5de9303743e2c8e6fb3c87a7a35
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan PDF. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users. The PDF structure and embedded links are indicative of an attempt to exploit users by directing them to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://atl-50.com/files/file/zumumujebefivasepe.pdf
    • http://cfh2.com/clients/d/d2/d2a7b52150a7a947468b52e9b7560e3c/File/bevasamumotefopuso.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/e6a8901d8743ffc92d9db2d4c717ac96/ximomovilelemagositu.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b7def10786d---2824481453.pdf
    • https://izr.fr/files/77026444981.pdf
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/61af1d9c8cd03b7e497db87ef9497d0d/nixupuropusodijo.pdf
    • http://boekenwinkelindex.nl/images/uploads/33933678939.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bba02d8b29e---94721179868.pdf
    • http://bagliodeimille.it/userfiles/files/30926283217.pdf
    • http://sangiorgioautoservizi.com/userfiles/files/19183420551.pdf
    • http://taikenplan.jp/ckfinder/userfiles/files/59159034318.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2db78c039---firetovufisasa.pdf
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/7jrjolenlhvniot5c4svn043h1/fodabosef.pdf
    • http://truhlarstvisollner.cz/data/file/98925475134.pdf
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/f8c015de09c489da2146fa86861e906b/14087653805.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/84b3778a118bcdc524ff07bfc6be7521/rewifusozowe.pdf
    • http://componentcnc.hu/uploads/ckfinder/userfiles/files/4177800033.pdf
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/eb9a22c2ac6d7dcffa5a1d48c73b9365/92230022660.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0260c9384---50115164720.pdf
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/hh03m3q5tjjtcqcc8cgacko3g1/10557802438.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3b4d5bd6b---42539422021.pdf
    • http://mtecommerce.it/public/news/file/97716273658.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=team+working+competency+answers
    • 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_off00014f22.bin
1eb40a7e218856784b5225603be26728ed28dc8d6ffbf6118936fd42128e9366
pdf-font-stream PDF embedded font (sfnt) at offset 0x14F22 16996 bytes
font_01_sfnt_off00017b6d.bin
c2cb963acf96d73885893c8caab77d16cd26286b6c32180119b9155b681f235d
pdf-font-stream PDF embedded font (sfnt) at offset 0x17B6D 10928 bytes
font_02_sfnt_off000194d8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x194D8 16792 bytes