Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e42747205d3c5f4…

MALICIOUS

PDF

91.6 KB Created: 2021-07-04 04:35:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c2e249cc67e06ab3e25dab17d2e58b1e SHA-1: 79d1bf8bc65ee809f1eaae4e3ed21939bfe21410 SHA-256: 7e42747205d3c5f44a0b10616a7d45c6e133372509debfe8b7b9a2df319613e3
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS upload storage or are structured as link farms on disposable hosting. The primary attack pattern involves directing users to potentially malicious external sites, indicated by the high number of unknown reputation URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/3412e5c21f308e63c2567f62a9b727eb/ninojozow.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607751b484362---judazafelatobimen.pdf
    • https://fultoys.com/userfiles/68548024761.pdf
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae06b4817a---jatidixutadik.pdf
    • http://amctop.com/board_data/editor_img/file/202106202217.pdf
    • https://whiteplacard.com/UserFiles/file/36482661623.pdf
    • http://abpaluso.com/upload/file/jufawofevupetab.pdf
    • http://turatabor.hu/media/95257231952.pdf
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/789b6099ef7bf7e2d7ae491750278ceb/sotazenerutamemuzi.pdf
    • http://mywayrtk.info/userfiles/file/feruxanujawepowezunikuga.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091ffc687a3f---wibeponinodasaziwelupos.pdf
    • http://cgl.lu/userfiles/files/71246536736.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081fc4e03c0d---63303373076.pdf
    • http://kubabus.cz/novy-web/upload/file/jeledixofobozed.pdf
    • https://bjsteelvietnam.com/upload/fck/file/62826410961.pdf
    • http://ristorantebiscione.com/userfiles/files/61465929559.pdf
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/bfe81jtcgopofuqafukcrs54j1/mikigejegekelad.pdf
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/34e1e845e8033fb11b89030b44f2c1a2/25353760442.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d9997a4a06d---59164325681.pdf
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/146116965ece3b385ddb2bf92b79a20f/29800489567.pdf
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/efe06c38564b42e884b588cf0cc0ac2a/gitixulolipinab.pdf
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/fc8a03f81708260d2c4162c7a09f3779/70540977529.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=the+croods+2+free+online
    • 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_off000100e1.bin
5bfaeb5e8a3cb20e84927c1770b1e4686ef47b473d2a7820ba15c0ac4cee84d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x100E1 10396 bytes
font_01_sfnt_off00011851.bin
3cf7ac6284a626ad274fb4284e78933a486385df0914409bb38f2286a9bcc2e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x11851 17856 bytes
font_02_sfnt_off00014758.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14758 16792 bytes