Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1466b8a8fc57f76…

MALICIOUS

PDF

88.9 KB Created: 2021-07-23 15:29:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 360ab9c7e0dd0f89fe197c75e5152ef1 SHA-1: 23bcdd9bcab1485abe9ea7cdfcd8decc0a83f3fd SHA-256: f1466b8a8fc57f76906bf8d4eb61ff94276ce31b2c871621c295c79e18edaedb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a link farm hosted on compromised websites, likely intended to lure users into downloading malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded URLs suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079091ddc663---5981571520.pdf In PDF document text
    • http://chinajessie.com/seadata/data/uploads/img/file/162208372183.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/cb5c98d5958fdb908dbfe71bbb1047d2/kikasunapuforu.pdfIn PDF document text
    • https://infrastone.com/userfiles/files/14954212882.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/20e7103d65fd53d6e0a0101dcc1c353d/97342168671.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096d96bc88a3---gikobowofepixadas.pdfIn PDF document text
    • https://martabaktelor.com/contents//files/26328836354.pdfIn PDF document text
    • http://ssteelelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/87694028512.pdfIn PDF document text
    • http://ozhelalikram.de/resimler/files/mibet.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160858b965e4bd---15639851572.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16072e9282afd5---50627836629.pdfIn PDF document text
    • http://yokohama-model.com/userfiles/files/74159038136.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/xezurobiwuzinopebuwil.pdfIn PDF document text
    • https://e-ceramika.pl/userfiles/file/55035277507.pdfIn PDF document text
    • https://envida-nieuws.nl/bsb_website/upload_fck/file/98107095533.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/51346945634.pdfIn PDF document text
    • http://argyleliquidations.com/userfiles/files/30771547195.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c78e7e45a7---87005033522.pdfIn PDF document text
    • https://dineflon.com//files/lusizepokukixime.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4702a174b7---zeredowenokezov.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/b2bfe0f0ef9bb171e6ffc5bbadbbf41a/47004258215.pdfIn PDF document text
    • http://www.chatanakonci.cz/userfiles/file/lutukotarudulixinudimej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=how+quantum+jumping+worksPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160862f0f9fcb0---mojazizejonegufuf.pdfIn PDF document text
    • 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_off0000f6ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EC 10964 bytes
SHA-256: 4f63b69f003efa48835c598e893d67f1a9c12ea177ffebf4e89a1f101a1ae92d
font_01_sfnt_off00010ff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001280a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1280A 17320 bytes
SHA-256: 96c9482c1ba398b4ecdbbd70a6f97231ffe18de51dc34007247681ce16db818d