Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6fece1beaf0c210…

MALICIOUS

PDF

86.6 KB Created: 2021-06-28 11:06:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aad21a1aee28cf574794704040675e73 SHA-1: e4883c2c1143cbe3418998658f2c6ae137b67330 SHA-256: b6fece1beaf0c210131c292bbbdf8f028079ac22b4960f36d49075912b9681aa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to potentially compromised WordPress sites. These links likely serve as a lure to redirect users to phishing pages or download further malicious 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 http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607061a6493c2---98605491212.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607043f44bbcc---90141005843.pdf
    • https://itchanoi.vn/uploads/news_file/9613082312.pdf
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d8662c30a---dofuwaxugexanuneruwa.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/f9803782a302db5b8ace760d33b23806/wojivebiwus.pdf
    • http://moreit.ch/productinfo/file/76222813964.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609771a9e6f0d---duwojepeguse.pdf
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c09a9111dd---3280538761.pdf
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/5efciqd1kq4tt8jlglj5cmjch6/83565181086.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160856e619ff05---favemonetalokade.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f12dc8fc3---loliveratu.pdf
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/pakawumazufevamisivuzakid.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5060bbf70---fowasigogukulizakiwekizu.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d2446b14cdd---76439323644.pdf
    • https://aquafilling.com/userfiles/file/nigax.pdf
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a954db1f9a0---duxudujawinituj.pdf
    • http://beiks.info/public/file/35220162829.pdf
    • http://angelcabrera.com/FCKfiles/file/40377448721.pdf
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a17ab00e9a9---ruvibazapudiweni.pdf
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/d7f9d528d4ea43a2adb814977c85c6a5/veveluwifives.pdf
    • https://hoalavender.net/upload/files/68690106232.pdf
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/95cecc5eb93a1602b3e2ea9c82d29612/92783182394.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/lqr6ejhk69q561ah3igsvkvjoe/4128680117.pdf
    • https://hostsolutions.ro/app/webroot/files/userfiles/files/72352701724.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=baby+bed+bugs+look+like
    • 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_off0000f08c.bin
9b9f408e574cd3a6f8c4e4d914361bd6db134edf4e06464b8f9a86d474609ac1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF08C 17148 bytes
font_01_sfnt_off00011d4f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D4F 16792 bytes
font_02_sfnt_off00013566.bin
814d7a41e02e25db5248ddf9d053b2eabc69e731705a92b1639974fb6a2cd4f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x13566 10620 bytes