Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9325b832fe6127a…

MALICIOUS

PDF

89.4 KB Created: 2021-07-01 22:25:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fd4b69875d217a9fc4906f2a4e3079b7 SHA-1: 2af14d74078c27fb5ee5bbb67e68c2463c795189 SHA-256: c9325b832fe6127ad3567718f6b3b974b30cf5548e8faa8e41a1a201b4996f83
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites acting as hosting for further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads. The file's structure and URL distribution align with a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607f174057b65---bajodofu.pdf
    • https://advik.net/userfiles/file/53992611892.pdf
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608054549500a---sirulaki.pdf
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160971b329f1a3---nesujanururotusotaralub.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aba50864a91---gudoxodediverutevevemu.pdf
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/35ea213c823d28cd83dff3e772221576/rajinekobur.pdf
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb86ab03a11---siludofogagirezib.pdf
    • http://adance0112.com/upfile/editor/file/99337410059.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160764039bf0a4---letuzas.pdf
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608da27ed1ad0---delujakuwugekefepokebo.pdf
    • http://katheran.com/clients/55933/File/muzoxesumujorozidozib.pdf
    • https://anjingliar.com/contents//files/54030570276.pdf
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/fc76424bd832908b29617710275a861b/davogavawabazafu.pdf
    • http://strategie-online.net/catalogue_dynamique/file/wapusipaxawufiverowoxe.pdf
    • http://oprfhs70.com/clients/879438/File/xupolixemifopugoreguroza.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/a6897372c5a8608c5e502c93980a27ab/rijonixiduta.pdf
    • http://www.moyekolodin.com/files/mokoxewivasasi.pdf
    • http://madmojo.com/fckupload/file/nolix.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a458ba041c9---10208442853.pdf
    • https://cnn-logistics.com/asset/files/fijujamubapop.pdf
    • http://frangarcia.eu/upload/file/16500211089.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c69be79658b---dudoxobosewibulomeso.pdf
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/8a75cbc2765d62748d56fd5cd390d96e/24818976123.pdf
    • https://sayurmateng.com/contents//files/panejiputunofajosotujimov.pdf
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160983d08230d6---panewanopaletaro.pdf
    • https://eyetracking.pl/userfiles/file/sesolu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=homonyms+of+cell
    • 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_off0000f8f5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F5 16792 bytes
font_01_sfnt_off0001110c.bin
553d3c44fa1ecf9e3525c711d2c8bd58ca5cd02d5f83ca422b1b65b74fec5212
pdf-font-stream PDF embedded font (sfnt) at offset 0x1110C 10152 bytes
font_02_sfnt_off000127b3.bin
01ec5009b4061acf70a4f4c166a046808dd14719fc28511012d22625abedbf90
pdf-font-stream PDF embedded font (sfnt) at offset 0x127B3 18024 bytes