Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6df961deffed0ac…

MALICIOUS

PDF

75.2 KB Created: 2021-03-22 17:16:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8a410f2c290a4cc8cbb94097e890f514 SHA-1: 88a39645fd0b486c1aecc0a3bab02e983b6e4008 SHA-256: e6df961deffed0accc876a39677711e03aa6504c8001a135ce659d760bd798c0
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gimoguvi.ru/award?keyword=fundamentals+of+accounting+principles+wild.+larson.+chiappetta+pdf PDF link annotation
    • https://fimegelepa.weebly.com/uploads/1/3/3/9/133999933/9465513.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476152/normal_5fdb77fb4739a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443804/normal_603db8c545440.pdfIn PDF document text
    • https://sebonegipuwi.weebly.com/uploads/1/3/4/1/134108682/nobakesegog-tisikigo.pdfIn PDF document text
    • https://figapizezedop.weebly.com/uploads/1/3/4/3/134364787/f84ccef2d9f.pdfIn PDF document text
    • http://sokujojetutita.iblogger.org/chamberlain_1_2_hp_garage_door_opener.pdfIn PDF document text
    • https://pilinosaw.weebly.com/uploads/1/3/4/8/134852056/fokus.pdfIn PDF document text
    • https://disadoxamegipu.weebly.com/uploads/1/3/4/5/134527150/d956e979555.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://puxagere.epizy.com/detail_information_about_kabaddi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35de0e12-90b1-489b-aae3-22eab81c3f0a/nuwojun.pdfIn PDF document text
    • http://lunodemexixape.epizy.com/44413531362.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ae3bbae-b944-4fe2-a57d-45bc84eedb9f/nekawox.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/73869391672.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44e6ad18-a3e0-4e6f-a604-e609cfd9a532/is_taco_bell_okay_to_eat_while_pregnant.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21dd820f-fb54-4f18-b416-cd4c0bd1d2b5/all_american_canner_sizes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3bbc300-aab0-4c04-8f00-26343e5a24ff/what_molecules_will_exhibit_hydrogen_bonding.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55a846fa-a740-4c24-8852-4d1fdd3c9c83/autobiography_of_a_face_chapter_5_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55b0d38f-f920-476f-a90a-e15aed918ce3/xejaratudivujisiko.pdfIn PDF document text
    • http://nejowubixulifud.rf.gd/annexure_form_for_tatkal_passport.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/balam_pichkari_video_song_pagalworld.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9d8ea71-4f92-42cc-a758-a2e82d84f930/madanegexub.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE461 5648 bytes
SHA-256: da615dcb512198ba81f8c0475fb408dbba5fe55573d33a5882b9eea29c214110
font_01_sfnt_off0000f789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF789 11000 bytes
SHA-256: 44265b3984525bb193a374603c310bf42f3ff8f85b1eb531dcdff16d99937383