Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeaaffbc8866eac6…

MALICIOUS

PDF

86.2 KB Created: 2021-08-18 06:00:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fde08cea40d1c3ebc7ece0304420fd67 SHA-1: e544f3455ec8eda90caa84f2c5b883f88e6d38e2 SHA-256: eeaaffbc8866eac678788eef85c35fe0b034358c6fb21289b548da44e384d8ab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised WordPress upload directories. The presence of these links suggests an attempt to redirect users to malicious sites for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.ewdel.cz/ckfinder/userfiles/files/viresabugalulag.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160e05f6b179e7---60104666111.pdf
    • http://avandcie-automation.com/ckfinder/userfiles/files/2862607714.pdf
    • http://castrolmintabolt.hu/images/upload/file/viramezupixopazofejo.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/0f3f0ee6aea35d04ec7b843aedfda77d/xafibopamof.pdf
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/53f5d7ab5613b9b67c15039265bec792/42045049801.pdf
    • https://www.dooleysnaturalgas.com/ckfinder/userfiles/files/nufekisoxuluvowixo.pdf
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fddd4ac705---lazabaxul.pdf
    • http://nollve.com/img/editor/image/file/bofuwag.pdf
    • http://thanuyentea.com/ckfinder/userfiles/files/tejaxitozupudisu.pdf
    • https://f27szerviz.hu/upload/files/lukipulepadusofad.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16110195a79719---puzugi.pdf
    • http://kaztelcom.kz/ckfinder/userfiles/files/82311552046.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/204a3f4f3e3140f74f62097adf7a83a4/dopuvakesavemudo.pdf
    • http://progfin.pl/userfiles/file/vibixudasixovoziminit.pdf
    • http://poltinka.ru/userfiles/file/tiwebiregakenozep.pdf
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/8db4a367af02c34b84445048873614a0/dujodafebuvubon.pdf
    • http://myjobcareer.net/userfiles/file/2021062806050673499.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/69ddab8d8cf53ce08710b2ddbb4b913f/89608086709.pdf
    • https://textolinguisticsolutions.com/upload/editor/file/nudofadesumewudi.pdf
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093480968244---11001255569.pdf
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/7a6ba582a11ecd19be03f16da3a54424/sogifagikisubaluv.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=historia+de+la+iglesia+cristiana+resumen
    • 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_off0000ebbc.bin
c103242df416d827d5f190f765bef1a9a24d8fb77cb5114384e0dd721fa80e92
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBC 10804 bytes
font_01_sfnt_off0001045a.bin
7691880b976ba3f8ccb7e3ebcc68a794854b2e912735d663a0d4908900ba3810
pdf-font-stream PDF embedded font (sfnt) at offset 0x1045A 17564 bytes
font_02_sfnt_off00013123.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13123 16792 bytes