Malicious PDF — malware analysis report

Static analysis result for SHA-256 df5e077209d8d997…

MALICIOUS

PDF

99.1 KB Created: 2021-07-22 13:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 45f524e2be8c425dd16040bb41bf3f8a SHA-1: fdca497ed0be049479b98239918d61ffd75a4db5 SHA-256: df5e077209d8d997bbe0f3d33158152ba1558c35f17dcd1420989a6b216b0f04
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or are hosted on disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://pogotowienaukowe.com/Upload/file/mupewasinetejone.pdf In PDF document text
    • http://selfmadefilms.nl/userfiles/files/gujavetaro.pdfIn PDF document text
    • http://akademia-jedenastka.pl/zdjecia/fck/file/72944349951.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/77610616265.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/3c7f3cd331698420eb33d720beaa3914/topavo.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608dee8bf141b---65779446538.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/6b7bf129ddaca93f87a24316054ba789/54836581809.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac142fb459b---57544946032.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160740bed7a614---rejaw.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdc0341452---69457665974.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/74f4cc4a34a0ea58c9be7c6dccf55d5a/75165750204.pdfIn PDF document text
    • http://shipsupply.ru/userfiles/files/5661634685.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16096a6ce658c9---3717284591.pdfIn PDF document text
    • http://spy-military-labs.com/userfiles/file/mijobodajojasupu.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/posezalogamojati.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/aa4c42d1ea55f079ba59b05ad0b96694/xinuratevuxorabog.pdfIn PDF document text
    • https://thietkewebseo.com/webroot/img/files/79248245344.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a555224ee2---rilapojaxabib.pdfIn PDF document text
    • http://kompletucetnictvi.cz/files/file/januruxiduvulobusona.pdfIn PDF document text
    • https://drivetripper.com/userfiles2020/files/84909669496.pdfIn PDF document text
    • https://emmaushuis.org/pages/77456096512.pdfIn PDF document text
    • http://119pump.net/d/files/gusesi.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/zamuter.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16084ca68b79bd---viluwilulugodotabek.pdfIn PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/82294405750.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=farms+in+medwayPDF 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_off00011fa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA7 17744 bytes
SHA-256: 6f1fb9bd6cef09d7c7ca8c2a2bf4f5c84a147868168cbd5cbe49d71d3f38ee7c
font_01_sfnt_off00014e88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E88 10320 bytes
SHA-256: 02a8428a9581258c33db0509326aaed80b97710f9827ad9141d9b1104a9f7620
font_02_sfnt_off000165cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1