Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a0404c644b70331…

MALICIOUS

PDF

70.7 KB Created: 2021-06-21 00:25:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 70b74cb188606f5710f997098a0af9d9 SHA-1: 028482b76ca4108e361382b924008f77491ad8ea SHA-256: 1a0404c644b70331a6d95e04162f3b54d78789f4783573fe6160fabf7fc4d37f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to host malicious content. The document body, though heavily obfuscated, appears to be a lure related to 'J cole kevin's heart mp3', likely intended to trick users into clicking the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/6cad05a932176aecb55bb856ed393b80/88836948489.pdf In PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/e6ce577239ad2c69f279410d48b62e09/jalimefesufetu.pdfIn PDF document text
    • https://aravlicraft.com/cmsCart//upload/file/23388202513.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/16096feda5daba---gajizetewugakaxuvikavet.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16090aac548031---68132676724.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/mimosuduletewenenomuwawod.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080388f69a5a---95704300547.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/3ehud9riinp3b9avgedibka5um/radosifokufinuloromaruxo.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/0rmfdlsbohc5hat415mruhch91/sonowes.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/a092cf978ca80a06a834be34912f7916/xemoxefepinikuze.pdfIn PDF document text
    • http://prof-cosmetics.com/upload/files/15010815382.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/16349376596.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/0ad66d8f29ddb873dda05ecd0ddfd9b7/99270233185.pdfIn PDF document text
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/godixisiwulubejo.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/6p8ah53g2u82n5calhilt9p5t7/losivosoxolilesizifotono.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/47724740252.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=j+cole+kevin%2527s+heart+mp3PDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC252 3756 bytes
SHA-256: 4e4e0a9680f6fd4c8951681f397d2a34ab49df9ee8a8d3a19db9868ab184adef
font_01_sfnt_off0000cfe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE2 5484 bytes
SHA-256: 9e18a6217ef64cbcc80d4553f31d7bf31bb46c63edf766466dc7c1ae2e4fc8b9
font_02_sfnt_off0000e26c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE26C 12172 bytes
SHA-256: 66a24fbf038552f1036b4e423bfdf708f195895122207665af82b301ab545e62