Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cb2940c1d85598f…

MALICIOUS

PDF

86.2 KB Created: 2021-03-20 05:08:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 853f8e7ae3c34cd4a1861aa0cec3f8fe SHA-1: 5f81b2cb7383511c6c09a26e70f03f326d01e110 SHA-256: 9cb2940c1d85598f10b6378e0189985781a46c579af51ddcfc897a655b5f9e9a
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://maypoin.ru/wix?keyword=stoichiometry+review+worksheet+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367922/normal_601af807b1460.pdfIn PDF document text
    • https://cdn.sqhk.co/gasubapo/guI9jeP/knights_of_columbus_fish_fry_near_me.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/sony_cdp-cx355_belt_replacement.pdfIn PDF document text
    • https://cdn.sqhk.co/muzexeragod/Ygihhid/79491839397.pdfIn PDF document text
    • https://cdn.sqhk.co/vilubofi/jcTTghf/10605601843.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391634/normal_5fc8bf696882f.pdfIn PDF document text
    • http://fosavaxenu.mypressonline.com/differential_diagnosis_of_appendicitis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370740/normal_602c54278f983.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503787/normal_604807cf6365c.pdfIn PDF document text
    • https://cdn.sqhk.co/vibupiwoxaro/dMLMVHv/19085122560.pdfIn PDF document text
    • https://cdn.sqhk.co/dusaradezat/je12gin/hidden_valley_ranch_seasoning.pdfIn PDF document text
    • http://xuxoxobu.iblogger.org/56302253254.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://larovitivejel.atwebpages.com/texte_en_anglais_pour_apprendre_a_lire.pdfIn PDF document text
    • http://suvumudupese.epizy.com/nefivalimitamomeguvulez.pdfIn PDF document text
    • http://weparizik.epizy.com/24421489819.pdfIn PDF document text
    • http://dojafeduzig.myartsonline.com/accelerated_shelf_life_testing.pdfIn PDF document text
    • http://pojoviraxerojo.myartsonline.com/52733611229.pdfIn PDF document text
    • http://kizufalugomux.atwebpages.com/past_simple_vs_present_perfect_exercises_intermediate.pdfIn PDF document text
    • http://kafotafuvodalix.onlinewebshop.net/vikobirekinameralupafiw.pdfIn PDF document text
    • http://zupitatip.atwebpages.com/what_are_the_components_of_mission_statement.pdfIn PDF document text
    • http://dodigemadepa.epizy.com/algorithm._sty_package_latex.pdfIn PDF document text
    • http://safedoguno.onlinewebshop.net/semilojurawidadewarinite.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_off000112f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F4 5428 bytes
SHA-256: 6f0060411093bb7fd2ec91209be1a694a616fb96db20a479268517ffeea50c7b
font_01_sfnt_off00012557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12557 11076 bytes
SHA-256: 770190702ee56ecda818ee353e88c0600f9a7a8118104d54658cc08da5618306

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