Malicious PDF — malware analysis report

Static analysis result for SHA-256 732f3fa08dc5e08c…

MALICIOUS

PDF

79.2 KB Created: 2021-06-05 01:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 2f584024cc81de29b7e888c2677f98bf SHA-1: 26eeff2e97b75b667c34c4f4cd5755948dc75b56 SHA-256: 732f3fa08dc5e08c1dc219e8073ad632d84dacf7e2a394ccd6d627b616361047
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, identified as a link farm, with some links pointing to disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or SEO abuse. No scripts were extracted, but the structure suggests the PDF's primary function is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://queure.ru/pbw?utm_term=is+terraforming+mars+worth+it PDF link annotation
    • https://vituxusupodewe.weebly.com/uploads/1/3/1/3/131379836/lorijusivamasoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421780/normal_5fd8ddfecbd83.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4456398/normal_60b045118a162.pdfIn PDF document text
    • https://magirakikepemun.weebly.com/uploads/1/3/4/0/134000039/nagekugig_vumupo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450638/normal_60524773b01ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406223/normal_5fd7dd7057708.pdfIn PDF document text
    • https://kogovuvukadag.weebly.com/uploads/1/3/2/6/132682039/4040812.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417213/normal_6017a8808a46e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bujolajoxek.pbworks.com/w/file/fetch/144582774/how_do_i_cite_a_quote_in_mla.pdfIn PDF document text
    • http://wepoline.pbworks.com/w/file/fetch/144476220/62396212004.pdfIn PDF document text
    • http://gemometis.pbworks.com/w/file/fetch/144512859/bixby_vision_framework_keeps_stopping.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdb70db2-a4f2-48f5-8435-757cf430b017/26301310634.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf6f222a-9f66-4ecb-97ba-13c6c50b0c09/30200414184.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8349a412-33b1-4d62-b7b2-cd837bc044a0/87148097430.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecf96ea4-d6ac-4b33-a0e4-18972f8b3ee1/sijafepa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b101adf-da1d-42cd-a58a-91c32fa5287b/maximum_shear_stress_theory_also_called.pdfIn PDF document text
    • http://bawamotijeku.pbworks.com/w/file/fetch/144573891/how_to_connect_bose_bluetooth_headphones_to_sound_bar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5e0c57f-9775-47c8-bb0a-9ce59b89cf63/3219646062.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffcd9239-99d8-4987-9b81-acba78427729/jovumubewo.pdfIn PDF document text
    • http://pamotekegopa.pbworks.com/f/29464569495.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d871d5dc-e5fd-4424-8a15-5bdeadf313f0/what_is_the_difference_between_commensalism_mutualism_and_parasitism.pdfIn PDF document text
    • http://nilanom.pbworks.com/f/919721890.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56df0721-3b64-45c2-8cee-74b9d3029ef9/gebiw.pdfIn PDF document text
    • http://famukaser.pbworks.com/f/edward_said_culture_and_imperialism_contrapuntal_reading.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_off0000f757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF757 5180 bytes
SHA-256: f5a10922ca1577691cead3fe33a61ff908ae477951b5acad5a58cc57a40841a1
font_01_sfnt_off000108de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108DE 11316 bytes
SHA-256: c273b955c9e36a9c4d701ae608fb92131e5ceedc462d49e43ee95ae59fd1f57a