Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8d64ef30c3c68d8…

MALICIOUS

PDF

79.5 KB Created: 2021-05-02 04:16:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 227a8926fc760346e8b44a3f4f509cd2 SHA-1: 1437cb098a3133b703c1cf05ec459b51146979ff SHA-256: c8d64ef30c3c68d89d9f05b81e8ade8e8534bfe71d4b765bf44a0ffa4f7cb263
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URIs pointing to various domains, many of which are hosted on disposable or suspicious-looking domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/strik?utm_term=how+to+refill+black+ink+cartridge+canon+pixma PDF link annotation
    • http://generatorsale.ru/nursing_interviews_questions_and_answers_for_universitytvcyl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380890/normal_60123dfa35579.pdfIn PDF document text
    • http://amsidisi.xyz/928316318223gigw.pdfIn PDF document text
    • http://melowew.scienceontheweb.net/mcdougal_littell_algebra_2_practice_workbook_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366304/normal_5ffe42d1d706a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491439/normal_6044fece14e47.pdfIn PDF document text
    • http://rekabiwuxu.22web.org/91510096877.pdfIn PDF document text
    • http://mofobawosenej.mygamesonline.org/kelotanusidofurigeto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459341/normal_60579b3ae58f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462714/normal_602b93c6e21fb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://girifej.epizy.com/favogisavaruw.pdfIn PDF document text
    • http://debagejusuwaj.epizy.com/bibutoxag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/891bd5c4-d9ff-4d5d-b582-ca3a19703dec/my_new_honeywell_thermostat_is_not_working.pdfIn PDF document text
    • http://dogabofeki.epizy.com/minister_for_human_services_phone_number.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/fekivaraxaduwefexasakufol.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/20712625788.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3197a767-8214-43aa-8525-b9d5913f8875/samsung_a10_screen_replacement_near_me.pdfIn PDF document text
    • http://nebadutoputigit.rf.gd/41300851304.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb9d57f5-9017-4844-adf9-395fe749b533/the_bronze_horseman_book_club_questions.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_off0000f989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF989 5620 bytes
SHA-256: 2535aa5e3997908e3746b5eb8ed30fb0e6dd4cd463755d925707011719ebd5ce
font_01_sfnt_off00010cb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB0 10364 bytes
SHA-256: 9470618a4e2b88c766644d26b1df535d9976f12e84590ace8a5b5f2b20995074

Open this report in the interactive analyzer, or submit your own file for analysis.