Malicious PDF — malware analysis report

Static analysis result for SHA-256 14f896c299f42847…

MALICIOUS

PDF

93.4 KB Created: 2021-07-01 12:10:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 64dcd055e9c77d519020212117f441b3 SHA-1: 4ac0c3aa3c806c356d2e479778c49354e11471ca SHA-256: 14f896c299f4284736ab720796e6e1c76ef16c46174981ce10dde688df712da6
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 utilizing vulnerable plugins for file uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to these compromised sites. The file's structure and URL distribution suggest it functions as a link farm, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609a040c25208---30827779223.pdf
    • https://nestaerospace.com/uploads/file/dekovofisukewuzovixig.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ddc8c78db---juragibemagupexugiru.pdf
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/35deaca766445c0ac9411b0216f4d6b9/53180795811.pdf
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c2c5519937682d10f64db664220e9c08/92876976010.pdf
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/9aba03b67e5bd52e25ea10c8e8c2a022/91912109227.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0853f341a---nemarulatesuxemotiwax.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607cce26b8ec4---52041992626.pdf
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/01070cea142042d299b325079b8c9a3c/86608283267.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6639d7d0a---tarefadaxarogukagokezut.pdf
    • https://flardochform.se/userfiles/file/tafetanom.pdf
    • http://zdravi-kromeriz.cz/files/file/73831899555.pdf
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/cd02d833b1415b5a4fd47d23f66f6590/pipimetuzusidelogij.pdf
    • https://aucordechasse.fr/vosImages/dopifofefutazakatemalivuz.pdf
    • http://cesmclassof68cheyennewy.com/clients/82478/File/68735109192.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071d2abb9bfd---xunesu.pdf
    • https://dm288.rs/slicice/file/96277554531.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/11d3bscgat17uv3ecjg0o1b84q/papevusowibegenigog.pdf
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/3loiopljt7q20gmpeh78i0glgu/15398025912.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c65943a0fa3---19068225302.pdf
    • http://bscsaoner.in/ckfinder/userfiles/files/3695737683.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=cheapest+time+of+year+to+fly+to+hawaii
    • 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_off00010874.bin
7a275b6e10ca2a9417ef804e39ea184c4efd23d50514ff95d7ff0bdf85479041
pdf-font-stream PDF embedded font (sfnt) at offset 0x10874 10748 bytes
font_01_sfnt_off0001214a.bin
838b6b6dbef6cc4d57048ef2e3065b8e201fe22e4e6e56d1fad600409166e685
pdf-font-stream PDF embedded font (sfnt) at offset 0x1214A 17256 bytes
font_02_sfnt_off00014e7e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14E7E 16792 bytes