Malicious PDF — malware analysis report

Static analysis result for SHA-256 369304f58b92312e…

MALICIOUS

PDF

77.9 KB Created: 2021-06-29 02:22:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0e6b29d7bb2974b11b1cdef8ace10837 SHA-1: a56be9b9f3d133abbfae38ae38d99ab04b4e9bcf SHA-256: 369304f58b92312ea08ece15c48a5ca209ca43ec49457400607c7411cecef87f
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm designed to redirect users to malicious content. The document body is unreadable, but the heuristics strongly suggest a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://abpaluso.com/upload/file/nafubiluforawut.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd106c90ce---39242351658.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/4f0983a9d46da84cce7b734499095182/29548644523.pdf
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8a315b072---41195894003.pdf
    • http://sheeld.org/clients/d/d0/d021426cee8527c21a172be12ef3d645/File/jidoradegorinewuwuzup.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a85fd8d044b---pebotarakutokajij.pdf
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/c133cf9dd1e22c00d1e716b6a9f75ef4/xotet.pdf
    • http://bertrandetgastineaudesigners.fr/userfiles/file/25419015821.pdf
    • https://bonacorsi.it/file/tukax.pdf
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/7f892ce75b4723c2214bfa65464e42e0/sexejevuxefedetirurovex.pdf
    • https://clickkedai.com/userfiles/file/3205968125.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb706262dc---jofaxobisirunowubezo.pdf
    • https://skinrepublic.vn/webroot/img/files/77716573358.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec487227b6---xijopoboji.pdf
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2acd40eb5e---pelosujulegufomem.pdf
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/kenituxak.pdf
    • http://stonestudio.pl/files/upload/file/kokimujiro.pdf
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/46147273073.pdf
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/922879577ada3e80cd2ba64f51d2f5e3/24538882571.pdf
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c02fa9e1cd9---69936395911.pdf
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/d9a4d42f54f5b1db8935e55ab3cc765e/pijiruterolanekojo.pdf
    • http://richmediahouse.com/admin/uploads/file/pakorupawofiloxitupeve.pdf
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/89ece4c3a5b8cd3cb8f4008404f10416/16550815755.pdf
    • http://nuestratierrapremios.com/campannas/file/putaxuzi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+put+all+the+pdf+files+together
    • 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_off0000cd77.bin
c162434b23978f4d845a77c7cf016677904974bd5590888b9b88e38c73cd120f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD77 16736 bytes
font_01_sfnt_off0000f933.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF933 16792 bytes
font_02_sfnt_off0001114a.bin
4a15c45a5691902f8a89162dea74407a6ec6e94db21e8f82000e8fbf3fe5f0c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1114A 10852 bytes

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