Malicious PDF — malware analysis report

Static analysis result for SHA-256 f04d645f912c2e0b…

MALICIOUS

PDF

72.9 KB Created: 2021-02-19 17:55:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: c813d775ef91715eb8e8687c76307abf SHA-1: 9f7d0acde3d234c53ebdcfc171f92f4fcfce5c8d SHA-256: f04d645f912c2e0b1757776a623969d9ea3420c056ac4f82ab72274f13917b35
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. The document body, though heavily obfuscated, appears to be a lure related to household tasks, directing users to a URL that likely hosts a malicious payload. The presence of multiple external URIs and link farm heuristics further supports a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://jottigo.ru/strik?utm_term=how+to+load+brads+in+a+stanley+electric+staple+gun PDF link annotation
    • https://davufafelasipip.weebly.com/uploads/1/3/4/3/134328138/6fc88e2851e81a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407810/normal_5fd805e5704da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365575/normal_60183b8d43929.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386330/normal_5fd600edde993.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408324/normal_6015d933319a3.pdfIn 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
    • http://jejuton.rf.gd/21346440224.pdfIn PDF document text
    • http://jujonejetas.epizy.com/pretty_woman_roy_orbison_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/zarusafud.pdfIn PDF document text
    • http://povagemu.rf.gd/flywheel_energy_storage.pdfIn PDF document text
    • http://jekewakus.epizy.com/55462483137.pdfIn PDF document text
    • http://vovokab.rf.gd/filuzonidezuru.pdfIn PDF document text
    • http://gagoxapedako.epizy.com/mexeluwetonar.pdfIn PDF document text
    • http://lilivuxaja.rf.gd/tagalog_anime_site.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/vitaponenimujomi.pdfIn PDF document text
    • http://jitoritobo.epizy.com/que_es_la_arquitectura_sostenible.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/12213217875.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD220 5420 bytes
SHA-256: 49b5beb3cc6949430dcf807ddf206f8804263f41af264b4dfa5c4f42da6d2ad3
font_01_sfnt_off0000e4a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A9 10276 bytes
SHA-256: 2e9d61e6ef4760bbfbd1ed9e015ae61bb8995325ee87e01163533996c8bd428e
font_02_sfnt_off000107ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107ED 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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