Malicious PDF — malware analysis report

Static analysis result for SHA-256 199eec455f8056f7…

MALICIOUS

PDF

93.7 KB Created: 2021-07-04 01:53:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 54a910a2d5330306b4ed0e946ea0b656 SHA-1: 55799b0bfa48c7345eb56917f9b8ec5c9c3cff81 SHA-256: 199eec455f8056f752316406b994233c6d04cba3b5e1cc8bccf5d61ad5d49b13
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised WordPress sites, a common technique for distributing malicious content or phishing lures. ClamAV and ML classifiers strongly indicate maliciousness, with the PDF_SEO_DISPOSABLE_LINK_FARM heuristic confirming the nature of the links. No scripts were extracted, but the presence of multiple compromised URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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 http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771a3b8a22c---wonufokaje.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/jbn1j9oq3efru2g5fi0ojp6v09/kikorizida.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/vdjg98jqf1758i1m5i964qrt01/29867295002.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16091d6835d5ef---7906148298.pdf
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/a9a5684e88b2dac08360b36c8e4b366e/bibimod.pdf
    • https://liniagdanskzydowo.pl/files/48783071565.pdf
    • https://musikkursus.dk/userfiles/file/jogunen.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160915ee5ef436---delozosunonefaxatarena.pdf
    • http://awkontrakt.pl/ckfinder/userfiles/files/45581566380.pdf
    • http://cfacgroupe.com/uploads/FCK_files/file/gutivenutifiwazarigobojel.pdf
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b67e57aa31---4025705351.pdf
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/64d0f16d96b7cfda5193ad4a5b7b43c9/25851803410.pdf
    • http://ltptech.vn/uploads/userfiles/file/zurujapinu.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160da0a0f7583c---72831319949.pdf
    • http://agiusfuneraldirectors.com/files/file/modevotobeduxelabadut.pdf
    • https://clinicscrm.com/img/files/38165099167.pdf
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/63cd7393dcc276478ab205331275a7e3/gisifegonakudefik.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcee0ce5357---47709906327.pdf
    • https://talaa-obour.com/webmisr/uploadwebmisr/file/79562810695.pdf
    • http://texmet.pl/userimages/file/dobevanepumajivi.pdf
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/bg05e8s9bl4rube1kiugs4nlk1/52633230283.pdf
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160af8807ca462---wufonidew.pdf
    • http://westernstudioservice.com/admin/userfiles/file/jazegopuwetobidebofu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=maintenance+of+computer+hardware+and+software
    • http://s292376414.onlinehome.fr/datas/imgmail/file/96757355131.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_off00010900.bin
05cb0f4eb99e683f0fafb756803ec8d349d1ae240e5bdc7dee9e71bd806a64c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10900 11016 bytes
font_01_sfnt_off0001227d.bin
eac5078acd3d2d0ce7e42ceb733c0e08c468a116489527afba4d85cffe3563f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1227D 17540 bytes
font_02_sfnt_off000150dc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x150DC 16792 bytes