Malicious PDF — malware analysis report

Static analysis result for SHA-256 e29d8578538ae4e2…

MALICIOUS

PDF

93.5 KB Created: 2021-06-26 04:15:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4bcdcb204d652f5128ce94e67883de52 SHA-1: 847a07f53798bf90bfdcd86138a0b6914fe5ff01 SHA-256: e29d8578538ae4e22c43443727593669c20b06849d24ba74821d9cfeb56d5f67
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised websites, which is a common tactic for phishing or distributing further malware. The presence of external URIs and link farms on potentially compromised CMS uploads suggests an attempt to lure users to malicious destinations.

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://anandtouristcorporation.com/uploads/74119719367.pdf
    • http://clarksville.net/wysiwygfiles/file/6304105624.pdf
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/2bc369446c197e6ab51e0df1d9bda819/jizowuluwuwabogupe.pdf
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/d367fb24a4519f243261b349ea0c23e5/97306793801.pdf
    • https://optimustelecoms.com/ckfinder/userfiles/files/sutemubonidux.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608280d6b77d3---39789359447.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a013fab32da---borawugigerez.pdf
    • http://domainecomps.com/documents/files/faxajuxedafipinu.pdf
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/1s4q50p8abracvf6thk6s14a48/lulizanitolumaw.pdf
    • http://donateagift.eu/userfiles/file/kogiviwuvutolamas.pdf
    • http://suncitygroup.ir/basefile/suncitygroupir/files/xevuxijuxawoxometus.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/6357cd48fd1ed395fd01308eb99fd896/80830285368.pdf
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606dce2ea1a96---89733855099.pdf
    • https://ijmscr.com/ckfinder/userfiles/files/vakuwuwelinuf.pdf
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/fembu47ofi3arrbmgi5kn6lck9/9366716003.pdf
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/j6ehvaj4uavv4qn1k005rakmvj/vepolesefis.pdf
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/99eb168a8bbac4c712386f04841fab71/92937439456.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a649966c04---66374527937.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/vumokijufuxumajuna.pdf
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f58e507f73---61962067589.pdf
    • http://beijingbeat.com/contents//files/26551796077.pdf
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/2v5632go76pj76muqctm8o6bs0/winonusenugide.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f105d18129---giweneka.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/44a553bf83c5acb5a67e17b2e461ce14/reniti.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=depleting+water+resources+in+india
    • 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_off00010870.bin
a94556be2c0d44aa8fed6c7dd547a9e83f724f6c526b06978e724d4ba2288075
pdf-font-stream PDF embedded font (sfnt) at offset 0x10870 17772 bytes
font_01_sfnt_off00013765.bin
0a0313bc54424d62e1c47eee4b202c411c134c53560ec216a34bad15422dba2f
pdf-font-stream PDF embedded font (sfnt) at offset 0x13765 10876 bytes
font_02_sfnt_off0001508d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1508D 16792 bytes