Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5c878ed06065fe9…

MALICIOUS

PDF

94.2 KB Created: 2021-04-21 14:40:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 2a9fcb1e67273c3c989d5b3ca74e17ac SHA-1: d33987e6399117fd7172f06a34c72daead064079 SHA-256: c5c878ed06065fe904ea843507bffd9d69603b73f11ee53630be652c89096754
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains keywords related to comic books, likely serving as a lure to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://baarspo.ru/strik?utm_term=spider+man+1+comic+book+value PDF link annotation
    • https://cdn.sqhk.co/karapazepot/bs01Bgg/76366454539.pdfIn PDF document text
    • http://goniluze.22web.org/37428083425.pdfIn PDF document text
    • http://zawuruliwisevo.iblogger.org/67611339398.pdfIn PDF document text
    • http://porn77.design/damiduwazovodujazel28rfp.pdfIn PDF document text
    • http://fomilexavekol.22web.org/petobakovefozutopavekasa.pdfIn PDF document text
    • http://zahlungsservice-ch.site/pokisadesirumygn9m.pdfIn PDF document text
    • https://cdn.sqhk.co/zapimafe/haHihge/82289850280.pdfIn PDF document text
    • http://ccckkkkk.space/a_swiftly_tilting_planet_reading_levelfkfg9.pdfIn PDF document text
    • http://techanomic.com/zujavomekebusom6g.pdfIn PDF document text
    • http://bluebadge-support.com/18685112502kexa4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fofifalog.rf.gd/administrao_de_medicamentos_via_endovenosa.pdfIn PDF document text
    • http://kanadilu.epizy.com/ctet_question_paper_with_answer_key_2020_download.pdfIn PDF document text
    • http://zivonupawidam.atwebpages.com/arthrography_of_tmj.pdfIn PDF document text
    • http://topeleseluvon.rf.gd/pdf_bestanden_samenvoegen_met_adobe_reader.pdfIn PDF document text
    • http://rugupodat.epizy.com/76584724298.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a1385e3-9b66-42cf-894e-fa6f88dc20a7/715689925.pdfIn PDF document text
    • http://voxaxos.rf.gd/wiki_gartner_report.pdfIn PDF document text
    • http://gixejemazob.myartsonline.com/96560905517.pdfIn PDF document text
    • http://kepofif.onlinewebshop.net/sinunimerunowubijovufepot.pdfIn PDF document text
    • http://kosejoviwo.epizy.com/digital_painting_in_photoshop_free_download.pdfIn PDF document text
    • http://vobisobopimab.epizy.com/dizaposo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/975c073d-91b4-4eb5-9582-a0167c9fc782/jovisaxusur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dd19c2c-7985-42aa-950a-8e2a16e189b0/pearson_reviews__rationales_comprehensive_review_for_nclex-rn_free.pdfIn PDF document text
    • http://taguloxutenafol.myartsonline.com/28043540082.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_off0001316c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1316C 5460 bytes
SHA-256: b522d94574f93c7c51f8a3376b2ef78f9a091760c1d0df054befb6e22648851b
font_01_sfnt_off000143ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143ED 11636 bytes
SHA-256: b007bb4154e6f01852eb54b33f4ed07c64b31e01db782ffc9dea2a3234f86081

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