Malicious PDF — malware analysis report

Static analysis result for SHA-256 189704e4f2209333…

MALICIOUS

PDF

88.8 KB Created: 2021-06-27 14:10:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 254bd76fd2e23fb0e6a8a66d51c3979b SHA-1: 74eed4ccaaa309b2215e6ed32b54236f48d08dea SHA-256: 189704e4f2209333ba50639414233e39dc49fcee84d63b3c288e2ec02a02c271
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, directing users to multiple distinct hosts, some of which are associated with compromised CMS uploads. The embedded URLs and the overall structure suggest an attempt to manipulate search engine results or host phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://sieompaysdebray.fr/lesiom/txt/imgadmin/file/34644236468.pdf
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160709dfa4ba83---balajasojesiboj.pdf
    • http://wonikqnc.com/upload/editor/file/1622331436.pdf
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609225365bc86---bijopavijawepanox.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160765b7d40945---rogatasumileguzex.pdf
    • https://airshow-bg.com/file/fizezebujidumekep.pdf
    • http://anapro.com/ckfinder/userfiles/files/duposanujapomox.pdf
    • http://chapelguild.com/images/usr/favubetefubi.pdf
    • http://bukharaatlanta.com/sites/default/files/file/vekifenumigewabujowemi.pdf
    • http://divapharma.com/uploaded/file/60219627104.pdf
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/0554bd76749cbd203ead6a57c8f00413/latuwokazumege.pdf
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/7511be2bc03b0caaab3c1f890f282efa/namixatu.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9ad9d65de---xuzatu.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609835824cbda---zosurokitibugoxu.pdf
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087539560e89---36129095405.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609df02dc2fd3---13515118574.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/2nmaljokpdidirghu2108c9b1s/rasigenoteduv.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e3a419807---dixiwito.pdf
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/nipubog.pdf
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/fedde3f07d365c9d308eb3086ff6e818/sovuwufijopatoburagiso.pdf
    • http://midel.me/userfiles/file/48693124733.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/4548f0e4aea97784c0104b3c29b7d859/zanutanu.pdf
    • https://vansuloi.com/uploads/userfiles/file/gafinokogok.pdf
    • http://salinahighschool1968.com/clients/3/33/33fcb9b832a528c934b1ac42c6b88a99/File/tuvovuk.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=definition+of+phonology+by+different+authors
    • 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_off0000f84c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF84C 16792 bytes
font_01_sfnt_off00011063.bin
bdb5d4e057188e1412c065a6d394cb71d508b83ae31241cc7524f8dc2586adfd
pdf-font-stream PDF embedded font (sfnt) at offset 0x11063 11132 bytes
font_02_sfnt_off000129db.bin
0edf5aa58bfb4b252ed5575d8f774420139ec89b5b923614b7c2bb447f809ae2
pdf-font-stream PDF embedded font (sfnt) at offset 0x129DB 16788 bytes