Malicious PDF — malware analysis report

Static analysis result for SHA-256 f96cca962f20ada2…

MALICIOUS

PDF

92.6 KB Created: 2021-06-25 22:54:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: af3de641089a4cd0b13b1edf2ac4e192 SHA-1: bf0a0691a80808ca285a160a9a6780ab6d98bc47 SHA-256: f96cca962f20ada299a7e9ec9c2d75013a6f288093c16ca8538be99f9df5cb10
196 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, and exhibits characteristics of an advance-fee scam lure. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious PDFs. The primary attack pattern involves tricking users into downloading a fake document via a malicious link, likely leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160884a6eced95---wuverukawazuro.pdf In PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/129bf361138b6e06d7dd8d84287a5933/renimitumeri.pdfIn PDF document text
    • https://3drm.bg/uploads/pictures/files/63094940241.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f9977d052---xuvobelifasidigej.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/13822179456.pdfIn PDF document text
    • http://qzgj.cn/upload/file/diref.pdfIn PDF document text
    • http://moreit.ch/productinfo/file/96537280096.pdfIn PDF document text
    • http://garantc.ru/userfiles/file/sakak.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/1bd10aa4ee7ef8c735900610b707e38f/bopus.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/c0i4sqfumh834234c5mqr6iiba/tolinep.pdfIn PDF document text
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/afa0usoe0a6se6d5js4hdv409r/gugedogav.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6a9d0de90---faxit.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/d20ba10ae8c05a418aaed5733b2637f7/kopabit.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be99b4d0f8c---87055963818.pdfIn PDF document text
    • https://agatanorek.com/files/file/rajopadokile.pdfIn PDF document text
    • http://markone-tools.com/upload/files/nupijexafozeroti.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/32eb01a95f6b95ae8748f78ebc344885/93801057018.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/biwitepafesidazarumo.pdfIn PDF document text
    • http://blissworldbeauty.com/newerac2c/userfiles/file/40365340855.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/c86fc76f75820c7d6fddd7971dccafb4/zokekera.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=trivia+crack+answers+listPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/bff783cbc5d308d2712f0513867af846/xujabozeroxefabewo.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_off00010ad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD9 10308 bytes
SHA-256: 2b6dafd13d931df1a260996474809655a6c4e534157de5652d1d614a0d794b89
font_01_sfnt_off0001224c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1224C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013a5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A5E 16624 bytes
SHA-256: c6d6f2a105bc387db57c433e79692fa4e3e5d3a19a087a877756748c355e9aae

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