Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b461523a3ee9a63…

MALICIOUS

PDF

79.4 KB Created: 2021-02-27 20:23:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d5f2d9750f04d94da2a546c47e312a18 SHA-1: a5bfd7c0d243a64fe9ea3f5973bd1c0bf16a5e51 SHA-256: 2b461523a3ee9a636b31b435d9a24445924e79d305db34a6ff6505a3ed5b21a9
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which are hosted on disposable domains or link farms, indicating a phishing or scam attempt. The document body contains a search query, suggesting a lure to trick users into clicking these links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://zajinet.ru/123?utm_term=is+bohemian+rhapsody+on+amazon+prime+uk PDF link annotation
    • https://cdn.sqhk.co/sinemajud/eNiaQjb/29112103271.pdfIn PDF document text
    • https://cdn.sqhk.co/vekunego/gifjbjc/26457386259.pdfIn PDF document text
    • http://muxonobugimaki.22web.org/80797586186.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/bp1jjor/70382642064.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/cMVovja/indoor_water_parks_near_me.pdfIn PDF document text
    • https://bawigadumifop.weebly.com/uploads/1/3/4/4/134494387/soxikanunamuvazig.pdfIn PDF document text
    • http://datinge.site/noperit66ld.pdfIn PDF document text
    • https://cdn.sqhk.co/vumivatuvi/ihixhiT/14619647062.pdfIn PDF document text
    • http://senteber.site/bexumolodaraluwaxexituhneur.pdfIn PDF document text
    • https://kemebawe.weebly.com/uploads/1/3/5/3/135313751/7680919.pdfIn PDF document text
    • https://cdn.sqhk.co/gusoguribus/XIPjcid/world_boxing_challenge_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/lulamekajasu/e7Xjdhi/zetov.pdfIn PDF document text
    • http://nakozovuzu.22web.org/dutudolumuvura.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/catering_and_hospitality_management.pdfIn PDF document text
    • http://valapapiwusujeg.rf.gd/dungeons_and_dragons_5e_editable_character_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/counterfeit_currency_report_shall_be_filled_with.pdfIn PDF document text
    • http://zalufebali.rf.gd/55179732992.pdfIn PDF document text
    • http://zoribele.epizy.com/gefidolawukipemadidive.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/68991371478.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/home_budget_forms_free_printable.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_off0000f7cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CB 5460 bytes
SHA-256: 5e4093e8293dd9bd76d0e0c0cfd050eb1dba22df432ec0bcf9b4b9e497771928
font_01_sfnt_off00010a32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A32 11056 bytes
SHA-256: 959aa2c5044e8526e8ab4ee9829a73099ed549b6d1a500829712d53bf2d901a7

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