Malicious PDF — malware analysis report

Static analysis result for SHA-256 01a4914097210052…

MALICIOUS

PDF

75.3 KB Created: 2021-03-24 17:39:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 6ef700019a442c51db6be603cb99d563 SHA-1: 540c661e980abbff6009181165ea640083c1c5e3 SHA-256: 01a491409721005224355656e4acceae504d1b50f5573936fe244559d9b2f8cf
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The primary URL, 'https://soxebez.ru/wix?keyword=black+and+decker+food+processor+manual+fp1600b', appears to be a lure for a product manual, likely to disguise malicious redirection. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a phishing or trojan distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • 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://soxebez.ru/wix?keyword=black+and+decker+food+processor+manual+fp1600b PDF link annotation
    • http://devumixik.iblogger.org/44466183030.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6998e30b-c911-4113-ab34-4c15204891c7.filesusr.com/ugd/429b25_c698b0196fd0421bab07dcb3ed639ad4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbc3e2a9-497a-42dc-8079-c8b1c017a958/81361539158.pdfIn PDF document text
    • https://5984e891-aecd-43e6-866f-efdb297c9c35.filesusr.com/ugd/403565_57f910e4183c42eb8dc32cf02a65b138.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b7b8a12-9121-4d7c-93f4-985d8d51db02/what_is_the_biblical_role_of_a_husband.pdfIn PDF document text
    • https://95049c82-e412-4913-a0b0-e03e83d5170a.filesusr.com/ugd/127d6e_0124f1f6ea4a4e43a1ff9a9a6d8ea60b.pdf?index=trueIn PDF document text
    • http://pibufesoxol.epizy.com/28094967859.pdfIn PDF document text
    • http://lozopavo.rf.gd/basic_english_grammar_book_1_kids.pdfIn PDF document text
    • http://bopunuzas.rf.gd/industrial_organizational_psychology_test_bank.pdfIn PDF document text
    • https://ad9e3d1f-bb22-46ca-892e-b6aa3325a756.filesusr.com/ugd/837d34_288f2f1b5aac443e98769e9b0ccc8078.pdf?index=trueIn PDF document text
    • http://wobazopaf.epizy.com/alfresco_multiple_files.pdfIn PDF document text
    • https://5e54824a-8208-41b0-8aeb-7c017e8cfb46.filesusr.com/ugd/f64db8_0edeea003ac24cd296d7a6355ede088f.pdf?index=trueIn PDF document text
    • https://5f98d79b-b704-4ecc-a618-200e52db7f79.filesusr.com/ugd/d1a5b7_dc5f8eed6222478eaaa28e2202dd36eb.pdf?index=trueIn PDF document text
    • https://d38713d8-f9e0-49bf-8e72-3f46774ce551.filesusr.com/ugd/b3faf5_419dee63e3914d8fbeeb6693fbf409d1.pdf?index=trueIn PDF document text
    • http://tapewiwesumufug.epizy.com/648292944.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ba0bd6a-3bca-4221-9cbb-2d2b0757bd5c/34704732342.pdfIn PDF document text
    • https://6196a4e6-b3b5-4a85-a139-4ec84e0a53d9.filesusr.com/ugd/d01287_e5f970b53bb14eb7aac7df5f63229235.pdf?index=trueIn PDF document text
    • https://cb2d4818-2134-4ea5-ae57-1bc45cfc4292.filesusr.com/ugd/7e787c_0abc82cfeb3946ae842a9645ca94da82.pdf?index=trueIn 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_off0000e667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE667 5904 bytes
SHA-256: 72e04c9565927bc1a2f888c4c623e8f9fa7a24bde0a45e62df8c4130b052a005
font_01_sfnt_off0000fa6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6D 11152 bytes
SHA-256: 279f11043c60b6ee92f6ecd326b9a4f3cab0911d01d7016152be069204855bb2