Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0e0e6214c1836f6…

MALICIOUS

PDF

84.2 KB Created: 2021-07-21 06:41:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dd1bd7d271844bc2dd358082a48de97b SHA-1: 96eb97fc26d6da94deb60a3094098b96b4029def SHA-256: d0e0e6214c1836f620343173e135c79309be3d4e1f0ee508ed225a2e6b48d2c6
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress uploads or disposable domains. This suggests the document's primary purpose is to redirect users to potentially harmful external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://alpha-th.com/userfiles/file/34772822739.pdf
    • http://rydelko.pl/userfiles/file/84495035768.pdf
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16071998424dc3---gerigebufupobiwutateze.pdf
    • https://abofahed.com/userfiles/file/kodaj.pdf
    • http://businessnavigator.in/ckeditor/uploads/files/99192599625.pdf
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/8fe6c8c030bf6c86f4f91e3f800d81d7/29762877320.pdf
    • https://aucordechasse.fr/vosImages/biziworali.pdf
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097af2e69550---69763708879.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dabcce768c---76848819626.pdf
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/f327f5d1aa990143879bc9c186ca91a6/23193315429.pdf
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/9a61aa585224720236a6132c9a31846d/kivofevejupid.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/mhfko0ddmekbc1ech43a55l7g3/rosukonowirezosozotajezi.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087387d7149d---wonulab.pdf
    • https://panama4d.com/contents//files/teworonefowiponavosibip.pdf
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/2ov4618e95kng4pef1mrbvum08/dofekixasarapunoluvala.pdf
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/7e104ecd2d932e531eae5aa2b9025860/kofojozevavepowajiposu.pdf
    • https://victorybear-info.com/userfiles/files/6542492457.pdf
    • https://hophamthaibinh.com/upload/files/32173556984.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/3h02cs19fvqeomlcea8h24gavm/36565844576.pdf
    • http://antoniolescio.net/userfiles/files/34075297937.pdf
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/e29446f8e09d396579977f5c7561495a/89003650547.pdf
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/b3d2743941a50c879c76e6169739a0be/nemiruwo.pdf
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/lataboxaxavo.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070a3b9869db---76045752097.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=federal+buyers+guide+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_off0000e822.bin
26a546be00a08688941c11ee5d6e986a03479e1b37e76e97fcf0ad5432aec495
pdf-font-stream PDF embedded font (sfnt) at offset 0xE822 16628 bytes
font_01_sfnt_off00011386.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11386 16792 bytes
font_02_sfnt_off00012b9d.bin
c78486c3b07286f0d490b4380872d8f0165881c9158c15bd16a25e8b79233875
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B9D 10684 bytes