Malicious PDF — malware analysis report

Static analysis result for SHA-256 f74182e4e38c242a…

MALICIOUS

PDF

71.3 KB Created: 2021-02-15 02:47:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: d8ff19d120bea90ebc4f9036d6c09435 SHA-1: f9d6f4c5d239e10b99a4f8ac643470c3752f524a SHA-256: f74182e4e38c242a3d1f19c23f392f387f350e6c0191132dffe7aacd3019465a
126 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. The document body and extracted URLs suggest a lure for downloading a file, potentially a game, using deceptive links. The presence of multiple external URIs and link farm characteristics further supports this phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/123?utm_term=halo+1+unblocked+download PDF link annotation
    • https://cdn.sqhk.co/lokutibu/jfQjaic/chinese_close_air_support_aircraft.pdfIn PDF document text
    • https://cdn.sqhk.co/nomazotesi/dYWiihj/biwinavinig.pdfIn PDF document text
    • http://uscovidcharts.com/8573456945yeqg5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462376/normal_6015e90d7d9fe.pdfIn PDF document text
    • https://cdn.sqhk.co/buwuvibija/jhhhIgh/gikosutanipizusevusidun.pdfIn PDF document text
    • http://sushibara.net/crohn_s_disease_nice_guidelinesmpw3b.pdfIn PDF document text
    • https://cdn.sqhk.co/wemorapi/haijjgi/utility_trailer_parts_near_me.pdfIn PDF document text
    • http://ppl-nutrshopfit.website/driving_simulator_2016_mod_apk_iosm0qsc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuzaxovojige.epizy.com/53756556553.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/free_math_worksheets_addition_without_regrouping.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/43532067592.pdfIn PDF document text
    • http://zisibife.epizy.com/bikram_singha_bengali_movie_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/arvind_trivedi_songs.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_off0000da40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA40 4968 bytes
SHA-256: bcb030a816fa6a57e35fc5187eeacfcd8c30deb73afc530fa1ba17ca747d89e0
font_01_sfnt_off0000eb4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4C 10948 bytes
SHA-256: e9e1f43c5b891da81a0e5b96698b661f2caf640ac202e6abf7741e6afd813044

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