Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d7c5f1956cc51d9…

MALICIOUS

PDF

84.0 KB Created: 2021-08-18 12:30:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 42d29dcae4f8e8958dbe8d4e9f451208 SHA-1: b0e5dd322c699151bca55701b20673f785778468 SHA-256: 0d7c5f1956cc51d9420ef3625ca1f9b95a01dc69b0264708c1f0a17087134c67
96 Risk Score

Malware Insights

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

This PDF document was identified as malicious by an ML classifier. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites. These links likely serve to manipulate search engine rankings or distribute further malicious content to unsuspecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • 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://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/83ca09384ff82a5af51d07b156448d24/21125337588.pdf In PDF document text
    • https://laptopserwis.com/app/webroot/media/files/22587571878.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/ae6a05efe93aa3b2a0d334b48bd7149d/lifitexitelenelilatola.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/350eeb7e7b88f98640c87b12601046d8/bubodezopun.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160acd7c641c13---74033784919.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/telazobawokukusiritaw.pdfIn PDF document text
    • http://alaskacounseling.org/clients/8/87/870ae3779d21e956d596131c1dd113ff/File/damedufaxazegolamul.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/d6huvimightjmnjqj0n7s692f2/sodiduto.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/dac750b052c1c213a55a5cd66c98b9fc/33982412478.pdfIn PDF document text
    • http://montrealpsychologist.org/clients/c/c9/c9c46cd79ea88ac5ae94f64bb0de8c36/File/digisemusef.pdfIn PDF document text
    • http://sea-cruise.ru/ckfinder/userfiles/files/48675071468.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3711da48aae2f478cbfe8d64f223660f/80622766873.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/xixuwepetewagadewojenux.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/rapubesowopib.pdfIn PDF document text
    • http://poiskvod.ru/images/file/tubadutow.pdfIn PDF document text
    • http://familiegravesen.dk/userfiles/file/46656596789.pdfIn PDF document text
    • http://seamcc.com/UserFiles/files/vimipimulotobezobanijama.pdfIn PDF document text
    • https://aksukartela.com/images_upload/files/fifejirikenapogo.pdfIn PDF document text
    • http://appli-veolia.net/ckfinder/userfiles/files/58856955678.pdfIn PDF document text
    • http://ledseoul.com/userData/board/file/gafolapasosupogoluvop.pdfIn PDF document text
    • https://numen-wow.com/userfiles/cloud//files/35088649936.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce0fa7d0e3---jasovelesikupimitajut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=ingersoll+rand+air+compressor+model+2340l5PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CA 11336 bytes
SHA-256: 05065457ad6cef9ca253e289a478472427b92eeccc625c9fe9f812b161a2c002
font_01_sfnt_off0000fd42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD42 16724 bytes
SHA-256: 31231e5b3d5d3402460ccc556ce9f384133b63e3136c0d04ce21b0aa1b52c96a
font_02_sfnt_off000128c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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