Malicious PDF — malware analysis report

Static analysis result for SHA-256 04319791836169f0…

MALICIOUS

PDF

95.2 KB Created: 2021-06-11 06:23:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 61f78bc8b4ad01a9de92032d2f3d8531 SHA-1: 56be046cbdd3badc8494b66f767965c10da3e109 SHA-256: 04319791836169f0ce25a90d925091d00fc68f3d9686fd2142520d4dfc0c83bc
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, many of which are hosted on disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to malicious websites for phishing or scam purposes. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards a malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://crysiq.ru/pbw?utm_term=word+2010+pdf PDF link annotation
    • https://dexatasudawuge.weebly.com/uploads/1/3/4/4/134477966/giriwobolejomo-fubesumazasavop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368768/normal_5fd149d1f39e0.pdfIn PDF document text
    • https://xadebunurag.weebly.com/uploads/1/3/1/4/131454816/8696182ab03eef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496602/normal_5ff2afa620b02.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4476133/normal_60b482e5db321.pdfIn PDF document text
    • https://mevinabepoke.weebly.com/uploads/1/3/2/7/132740553/jowosizijuve.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383475/normal_5ffdb1b60a4ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374540/normal_6025f224456b8.pdfIn PDF document text
    • https://defifipak.weebly.com/uploads/1/3/4/4/134442047/sokilibizov.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/660e4f5e-9954-4da8-ac11-cdaa4b4c3ab8/vunuwezupazedef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeb94ae3-6028-467e-b4bd-317db1a4c4a5/lenovo_yoga_500_bios_update.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9594af2-6eea-4fa5-93b4-54fca9fa7505/how_to_use_an_architectural_scale_1_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7138b0f-57ea-4cd7-8941-8f4c58845941/12256074876.pdfIn PDF document text
    • http://sawanixum.pbworks.com/w/file/fetch/144522192/supiriwipiresesi.pdfIn PDF document text
    • http://nadupodifado.pbworks.com/f/sigikewujo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f5e2fc0-5a6b-4f57-874f-13f8bb8898e9/what_is_the_setting_of_dr_heidegger_experiment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be15c1c0-f97a-4ab1-99b4-9b54b2596df4/vakexiduwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/323abb74-996d-4411-be72-0f7ea1aba5dc/jawanitakexikobanupopumol.pdfIn PDF document text
    • http://kolasotosexu.pbworks.com/w/file/fetch/145098219/wemitunixaxogurozux.pdfIn PDF document text
    • http://sipibujewadu.pbworks.com/f/wupopoxisuwokoziderejutax.pdfIn PDF document text
    • http://giresizuloki.pbworks.com/f/63165135795.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d794917a-2b4b-42c5-9d21-a60672f48fcc/bomoliwidufifegapin.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E4A 1872 bytes
SHA-256: 9fba9b0d9e2cc48f58c52755440c9a9bb3bd4c5dbe3d8c853d7e81cca7fbdf20
font_01_sfnt_off0001273f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1273F 4388 bytes
SHA-256: 99eb75d8f24355695108524d1de67ea4f4a2f7870d3d03b724d3a7edfaec6c48
font_02_sfnt_off0001363d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1363D 12836 bytes
SHA-256: 0215dee4662ff2a82969d3d710f0b354389d25e7dff0461f4d23172b448bc714
font_03_sfnt_off00015f4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F4C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176