Malicious PDF — malware analysis report

Static analysis result for SHA-256 221d602ff855c7aa…

MALICIOUS

PDF

69.9 KB Created: 2021-03-01 14:11:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: af5eb4be3c19bfdcd54705a20fe7003e SHA-1: d88e9aea9e458e137675cbd7aa07731e6071c5c3 SHA-256: 221d602ff855c7aa6feeb3bfd5f685be70e02b3be6a031b5c02164155146777f
126 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous embedded URLs, many pointing to disposable hosting services, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to crafting dioramas, likely to disguise the malicious intent.

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://pelibifir.ru/strik?utm_term=how+to+make+a+dirt+road+diorama PDF link annotation
    • https://xitipirobopu.weebly.com/uploads/1/3/0/8/130813988/5b520454733.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495265/normal_5fddf99ca3c55.pdfIn PDF document text
    • https://bupedokan.weebly.com/uploads/1/3/1/6/131607930/8119427.pdfIn PDF document text
    • https://mufabevazom.weebly.com/uploads/1/3/1/3/131382955/resitomexapel.pdfIn PDF document text
    • http://xamoxipuwizutux.scienceontheweb.net/honda_civic_2006_radio_code_canada.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474192/normal_601c74c3ce280.pdfIn PDF document text
    • https://cdn.sqhk.co/muzexeragod/geJiihj/sonic_episode_2_mod_apk.pdfIn PDF document text
    • http://jukavoluv.iblogger.org/xotusedupowamodugu.pdfIn PDF document text
    • http://rexonina.medianewsonline.com/puwoziwenilum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460447/normal_6005880841ba6.pdfIn PDF document text
    • http://lexibanoma.iblogger.org/bradford_council_tax_reduction_form.pdfIn PDF document text
    • http://nukakerosezopep.22web.org/49761359401.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xamelolupete.epizy.com/72451828885.pdfIn PDF document text
    • http://dofufaluwuz.epizy.com/detonation_performance_of_explosives.pdfIn PDF document text
    • http://kavibajegis.onlinewebshop.net/duguke.pdfIn PDF document text
    • http://diwavubodinaroj.myartsonline.com/neato_botvac_d750.pdfIn PDF document text
    • http://wugupijejituzog.rf.gd/cheat_engine_6._8_1.pdfIn PDF document text
    • http://tidomag.epizy.com/78450287529.pdfIn PDF document text
    • http://bofametif.rf.gd/39066562459.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_off0000d851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD851 4880 bytes
SHA-256: 9875d7cf168f32cf13ba148248671ca56e0f8bd5576acd7da794693114fd8db9
font_01_sfnt_off0000e8d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D8 9856 bytes
SHA-256: c82715b85f68cca8301f7a7f89ef3465c3fbf1ef6b9931c47abb32fbbb377a42

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