Malicious PDF — malware analysis report

Static analysis result for SHA-256 b726936b5f78369d…

MALICIOUS

PDF

79.6 KB Created: 2021-04-13 19:34:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: af444bff57bdd40fc90ecf6f4d9d6369 SHA-1: 52b59db48dbf5f755ea7a31654a8a544d1dad2c8 SHA-256: b726936b5f78369d3115a3dd2d95378658defdc1fb850018657c07cb0b670157
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://midufefew.ru/strik?utm_term=find+network+security+key+on+wireless+router PDF link annotation
    • http://grandov.pro/with_winning_in_mind_summaryfcr79.pdfIn PDF document text
    • https://cdn.sqhk.co/pumurugo/3jajP4N/82959900815.pdfIn PDF document text
    • https://cdn.sqhk.co/sofizagumup/Vghhcje/paint_mix_with_water_and_egg.pdfIn PDF document text
    • https://cdn.sqhk.co/wekonexiw/FghjiBX/fegavulawejukikew.pdfIn PDF document text
    • http://wutesokafuzirew.iblogger.org/physical_science_grade_12_quanta.pdfIn PDF document text
    • http://br1.red/does_mrs_coulter_know_lyra_is_her_daughter81a2q.pdfIn PDF document text
    • http://monongzhlh.space/divirobijuvxi1r.pdfIn PDF document text
    • http://skout.tech/740280488749089u.pdfIn PDF document text
    • http://jsexj.fun/48412813506k7s6c.pdfIn PDF document text
    • http://businesslinecenter.com/80642215292rjb9j.pdfIn PDF document text
    • http://hookup671.site/vadiwupulezo1hr9u.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://twoup-viktoria.online/the_witcher_3_hhlentroll_lebermr5t7.pdfIn PDF document text
    • http://reduslimitalia.website/speed_queen_washer_supportc5xts.pdfIn PDF document text
    • http://jonavaruxeri.22web.org/apex_development_report.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fekiboxupikus.epizy.com/gloomhaven_rules_book.pdfIn PDF document text
    • http://vimukomexetad.rf.gd/free_marriage_certificate_template_microsoft_word.pdfIn PDF document text
    • http://pojakopov.epizy.com/adhe_kangal_tamil_movie_hd.pdfIn PDF document text
    • http://sabozet.epizy.com/how_to_conduct_an_investigation_meeting.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/fuvosomaleximalebegalewas.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/brayton_cycle_ppt.pdfIn PDF document text
    • http://rixupod.rf.gd/laboratory_apparatus_and_their_uses_with_drawing.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/68360245771.pdfIn PDF document text
    • http://tefasuxonekan.rf.gd/60235092326.pdfIn PDF document text
    • http://febarufowit.epizy.com/bonubidawezagimiraratoz.pdfIn PDF document text
    • http://sisuvoxodukon.epizy.com/65237671269.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/rapofijevibumojosas.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000faec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEC 4936 bytes
SHA-256: 39e148931d6b046e114aa83c3f0254cc9b0015973b44594af5580171e2158c69
font_01_sfnt_off00010be9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE9 10308 bytes
SHA-256: 00d1527e5e4e88110bb8a9090929dccf7a2559d583e97b360d5476dc0cbbdac0

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