Malicious PDF — malware analysis report

Static analysis result for SHA-256 3267d3f38a614ede…

MALICIOUS

PDF

75.2 KB Created: 2021-09-15 19:20:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: de983333d75f55d333d317a56e9924c3 SHA-1: 266ed38858fd04d843bb8172cdfad9d2c768170a SHA-256: 3267d3f38a614ede78b7541a6ebd9a4c9530959633b0fb38f2db9a0b17657b24
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The primary attack pattern involves directing users to external malicious URLs, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://archism.ru/uplcv?utm_term=how+to+clean+your+ram+on+android
    • http://ogledalata.bg/uploads/pages/files/44479254381.pdf
    • http://sladkiy-ostrov.ru/userfiles/files/xevigu.pdf
    • http://bbfrontedelmare.com/userfiles/files/16712488436.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4e4eb317d---juvufusetezebekibazek.pdf
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/4b0a1e7c7abe53f2e429b46cc8ec11c1/49620114904.pdf
    • https://www.la-providence-ehpad.fr/ckfinder/userfiles/files/fajazadujoxi.pdf
    • https://vespaclubcagliari.com/userfiles/file/22055479805.pdf
    • https://njshore.drinkpoint.com/uploads/files/votowemuxorumidi.pdf
    • http://patanamachine.com/imgUpload/files/jasojosutejul.pdf
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/40412519705.pdf
    • http://seosanhrd.com/userfiles/file/68307444847.pdf
    • https://karinbentum.nl/uploads/file/xokiwakajeveziwebes.pdf
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/wiluwafotuxitawekituzu.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/75143c5d64950e0ca0c1e5a5f12a4c45/bifudibizilokopomediwaxib.pdf
    • https://europartner2.pl/uploads/dalineposunaf.pdf
    • https://morabia.fi/images/file/57556580298.pdf
    • http://munsusa.org/userfiles/file/20210912054936.pdf
    • https://arte-salon.ru/upload_picture/13907162022.pdf
    • http://globalfeedindustry.com/upload/files/20566830940.pdf
    • https://electrodomesticaruano.com/images/ckfinder/files/pivarujikapejonugikuv.pdf
    • http://ellenia3.eu/userfiles/files/71408292525.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f40e67f7a9---posukodowopizoledurifu.pdf
    • https://kstraders.com/userfiles/file/wamap.pdf
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130654dc19e6---nizifose.pdf
    • http://goldenbaycruisesagent.com/userfiles/file/99547237799.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_off0000c41c.bin
e8aa729ee2d0cfe44f1c6e5aa0d9e398aeb9f78779b6b1b4c1b675523470ea0c
pdf-font-stream PDF embedded font (sfnt) at offset 0xC41C 16628 bytes
font_01_sfnt_off0000ee77.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE77 16792 bytes
font_02_sfnt_off0001068e.bin
f31244fc55c4621c6d5760201982c072419597730955be5a147979ad29c4a92d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1068E 10652 bytes