Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee367cc60c56369a…

MALICIOUS

PDF

80.2 KB Created: 2021-04-30 14:19:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 359c55876b5aab34c5a30f6665b635ee SHA-1: 9df00ab8d0450be1e7401826765e81f3bfefd67a SHA-256: ee367cc60c56369aa4d580a4af835a699fdcde95529f5426f09aa5ca90c1bc82
126 Risk Score

Malware Insights

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

The PDF document uses a lure related to water heater maintenance to disguise its malicious intent. It contains numerous embedded links, many pointing to disposable hosting services, which are indicative of a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly suggest malicious content, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://bologen.ru/strik?utm_term=how+to+flush+out+a+rheem+tankless+water+heater PDF link annotation
    • http://goxutasabadatum.sportsontheweb.net/32592765051.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420034/normal_60223131a23d2.pdfIn PDF document text
    • https://fezapatinegu.weebly.com/uploads/1/3/4/2/134266508/7047154.pdfIn PDF document text
    • https://cdn.sqhk.co/sevigexew/g2Rhgha/sexakegisiga.pdfIn PDF document text
    • http://xamoxipuwizutux.scienceontheweb.net/patobulaw.pdfIn PDF document text
    • https://sedemosifov.weebly.com/uploads/1/3/0/8/130874126/jixilojipotovurip.pdfIn PDF document text
    • https://cdn.sqhk.co/gixedomawa/jckhe02/prehistoric_kingdom_demo.pdfIn PDF document text
    • http://peguxukeziku.sportsontheweb.net/adolescent_health_care_a_practical_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501486/normal_5fd03ca646696.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403816/normal_606c14fbab2ba.pdfIn PDF document text
    • https://cdn.sqhk.co/judawube/jdjeYhg/tutolamusukefofejiwut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425492/normal_602ff64c8b56c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454161/normal_602a97eae30b5.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/hjgjggh/gijagazewojar.pdfIn PDF document text
    • https://cdn.sqhk.co/gobefuvumi/UjbiedR/wubupedesaj.pdfIn PDF document text
    • https://zuxibonidape.weebly.com/uploads/1/3/4/8/134889984/1ce6a6089.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://42190e62-4dca-482d-a077-ae7b222d7779.filesusr.com/ugd/b91392_c305f29fa8c44c76bb6299460e00fd7c.pdf?index=trueIn PDF document text
    • http://fitagijup.epizy.com/94175276570.pdfIn PDF document text
    • http://powuruzi.epizy.com/buxegurirunuwu.pdfIn PDF document text
    • http://kopurelotalad.onlinewebshop.net/calendar_ortodox_2020_printabil.pdfIn PDF document text
    • https://1682489e-d94b-4f22-b6a6-c8ecb623ca2e.filesusr.com/ugd/5f226e_fcf262a4acd04d58807639cf2e66d316.pdf?index=trueIn PDF document text
    • https://0c43c058-97b3-435a-b041-a9f001bfa883.filesusr.com/ugd/791d74_ddfb7e91ba4c4ba39daf6c0309eb6bc4.pdf?index=trueIn 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_off0000fb7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7B 5124 bytes
SHA-256: 05e02f189a532166783eb5484b8e7cb147b28050a3978ee57278e3f24ce73133
font_01_sfnt_off00010ccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCC 11136 bytes
SHA-256: adcf3d3c46dd1ed945c3c9a47adce8a37e86ab5e98a77deee89b155ac9cdacf1

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