Malicious PDF — malware analysis report

Static analysis result for SHA-256 672d9fefa144917d…

MALICIOUS

PDF

89.9 KB Created: 2021-08-12 21:46:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e4ff0b2f0a9e5caba3d8fb244f2808c6 SHA-1: aa6a2e5427b3ae5107c944b6d8879da327ea9c6f SHA-256: 672d9fefa144917da4d6edd7c87cb22b0e50c73e0663f0e8075145fcfd426eb6
96 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous other PDF files, many hosted on compromised WordPress sites. The ML classifier strongly indicated maliciousness, and the structure suggests an attempt to distribute further malicious content or manipulate search engine results. No scripts were extracted, but the overall pattern is indicative of a malicious document distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://pt2-turbo-j3t.com/contents//files/7011702220.pdf In PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/dpu5jhgk8eupgmr0gvugqvqkq0/2505369357.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/5cac2ece399854b91a30e55bbf05dd12/99874039190.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/eofp2tndhaft971k3v8sp8gnl9/17494272029.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/c3t8aadhqdikbmsd5764656ift/laxipozogal.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be488505373---gewurinex.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/5592b4103929ec96f8c7d0247295cdab/40231023459.pdfIn PDF document text
    • https://umutisi.com/umut/upload/files/39079934342.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cb4a072b49c---60823817287.pdfIn PDF document text
    • http://machinegroup.ru/img/outer/files/80168740894.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/tofetixubutofip.pdfIn PDF document text
    • http://rykatd.com/files/diwevaso.pdfIn PDF document text
    • https://pollackmihalyiskola.hu/ckfinder/userfiles/files/sujonofufisesaruronir.pdfIn PDF document text
    • http://yasaitogo.com/uploads/files/64980918429.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16108a0e1a269b---rogizibazaletami.pdfIn PDF document text
    • http://gardenofsound.com/userfiles/files/fidewuragiso.pdfIn PDF document text
    • http://tc-antey.ru/uploads/files/67302697956.pdfIn PDF document text
    • https://www.aicsmindia.org/ckfinder/userfiles/files/tomitij.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cd66452d402---sugamuridej.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/domivurogalo.pdfIn PDF document text
    • http://ginzaoakland.com/uploads/files/pufusakotalo.pdfIn PDF document text
    • http://hnht-electromagnet.com/d/files/liluzexeziwo.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/af3155b5d1cdd1417bd43ecf76a07c89/40042094211.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/hsrgtb8kjr8da22hnl92tprs6h/dagoxezuzik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=who+is+the+next+super+smash+bros+dlc+characterPDF 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_off0000f906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF906 17620 bytes
SHA-256: 19c38bbc8b31195d9174e35ad9b664cec96e2373d84e5828101f35a878bd45dd
font_01_sfnt_off0001273b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1273B 11116 bytes
SHA-256: c219cbe8b5c3b055b0585b68a06ac55092799ce1d5dceb9f4458acdc501b92d9
font_02_sfnt_off000140cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.