Malicious PDF — malware analysis report

Static analysis result for SHA-256 32647efe162ca1a5…

MALICIOUS

PDF

71.0 KB Created: 2021-05-29 05:07:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 92835d2f46892f6104dc1b210214269c SHA-1: 9c9e3b6e5db121a53200d0e8ae556619a72c40c6 SHA-256: 32647efe162ca1a5ca7cbae872937c6078261b34b78fafc7a9f40b53cf0237e0
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 0.9960

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://dugedepap.ru/strik?utm_term=the+lightning+thief+musical+bootleg+full PDF link annotation
    • https://xonarupitowij.weebly.com/uploads/1/3/4/6/134617661/gadovur.pdfIn PDF document text
    • https://boginajidu.weebly.com/uploads/1/3/4/6/134693166/8110308.pdfIn PDF document text
    • https://gogalafubixuvu.weebly.com/uploads/1/3/4/6/134642314/aed32.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368504/normal_5fe1ce147f0ba.pdfIn PDF document text
    • https://pesonukakevu.weebly.com/uploads/1/3/4/8/134863065/9f8f8eaf01607.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476566/normal_6020aa0835734.pdfIn PDF document text
    • https://pifavakibapel.weebly.com/uploads/1/3/0/8/130814246/4930795.pdfIn PDF document text
    • https://bixaguvukimub.weebly.com/uploads/1/3/1/8/131872105/5291279.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413585/normal_600d6d8ec6544.pdfIn PDF document text
    • https://lanigitekepag.weebly.com/uploads/1/3/4/3/134395773/5980378.pdfIn PDF document text
    • https://fasexonepagi.weebly.com/uploads/1/3/0/9/130969542/5301548.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373782/normal_6041b4788e637.pdfIn PDF document text
    • https://dowabibagugodu.weebly.com/uploads/1/3/4/6/134697665/dujilexugabe_semokowesat_nisokemomif_kenegavejod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8e25b02-59ba-4c2e-9a66-762e6a2b5da3/why_is_my_top_load_washer_leaking_from_the_bottom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d99c2314-1f56-48e6-a390-fb51fa819909/what_is_the_main_idea_behind_dependency_theory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4b7361e-c097-4cf4-bf01-8aa88c3f8fe7/ryobi_10_inch_cordless_chainsaw_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/554c2f60-94f9-40ad-9b33-48527e66689b/14121187850.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/809fa11e-6757-43a2-b34e-9a7f576497e2/other_books_like_pillars_of_the_earth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ee9adbb-334e-4875-8bf7-d8dfd29cea3c/hp_envy_4500_problemen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a49ecb81-aee2-4da0-a357-253ab6ff5bf3/813801540.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/406018b3-37d5-4203-a1d6-582cf9fd05a6/why_do_data_scientists_get_paid_so_much.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b81eed49-3fc8-42db-b907-64ad4c3172c6/fully_automated_clinical_chemistry_analyzer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58d20ea9-d8e6-4ea1-adca-ee4d83f3f24a/which_practice_tests_are_best_for_mcat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a12a6013-972a-428b-87bb-1f800c0bc4e2/hobart_140_welder_refurbished.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/982e7278-83ce-4e5c-a526-d8f2bcab303d/rorewagadejaxosoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b614ff43-e4a6-4395-ac36-d23542ef71b3/sibofukeve.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_off0000d8c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C9 5288 bytes
SHA-256: cbc419eaf12fb916306900b29227e720385352087b997dcfbee047ef15b0cd26
font_01_sfnt_off0000eaaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAF 10404 bytes
SHA-256: 51817c2c61b106e4fe9799ecd6357f64b2aea5c0e9ef6fde1c75fc0c0c6606ab