Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1b6c6dca5ab5d4c…

MALICIOUS

PDF

81.7 KB Created: 2021-03-10 02:22:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b2bd8eea35f74ec911cfbbdc44904d28 SHA-1: 45c58b179c4fbb49589afcb4e81dfa4220d70aae SHA-256: a1b6c6dca5ab5d4ca8a687a671d9a7d610e810c3bc51a0c52a031500beb07af1
126 Risk Score

Malware Insights

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

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, indicating a link farm designed to redirect users to potentially harmful sites. The PDF structure and embedded links strongly suggest an attempt to trick users into visiting these sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://kuzutuzo.ru/award?keyword=apple+phytochemicals+and+their+health+benefits+pdf PDF link annotation
    • http://koteyarn.moscow/clash_of_clans_level_6_layoutdg5zf.pdfIn PDF document text
    • http://kowojolajamuv.getenjoyment.net/goviw.pdfIn PDF document text
    • http://xizabif.22web.org/interview_skills_telugu.pdfIn PDF document text
    • http://bubuletigesin.iblogger.org/penunuliriwimafuje.pdfIn PDF document text
    • http://gnoogle.site/what_size_tires_are_on_a_2009_ford_focusoeks2.pdfIn PDF document text
    • http://gallery-shop.site/19909608405znfda.pdfIn PDF document text
    • http://gijipodotetojo.22web.org/cartoon_sad_song_status.pdfIn PDF document text
    • http://puzexijabin.mypressonline.com/abrasive_jet_machining_report.pdfIn PDF document text
    • http://ideal-it.fun/what_is_japans_economy_based_onr8aqc.pdfIn PDF document text
    • http://dewiwusuxutez.iblogger.org/novena_a_san_judas_tadeo_para_casos_difciles_y_desesperados.pdfIn PDF document text
    • http://finipupote.mywebcommunity.org/free_digital_marketing_plan_template_word.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/xeponodij/how_did_the_internal_combustion_engine_impact_society.pdfIn PDF document text
    • http://fepapasofefo.epizy.com/letusuvib.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/caravan_war_heroes_mod_apk.pdfIn PDF document text
    • http://besubavivexuva.epizy.com/what_are_the_uses_of_transition_metals.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_off000102f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F9 5628 bytes
SHA-256: 2891f554306a883f5c8c9c1ff4a66441207bcec313297796e27c7b03a372a79a
font_01_sfnt_off000115ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115EF 10480 bytes
SHA-256: 1b622a72acd27f0c94f0bb942673f3d3756cc81676c18b85786930a5306af615

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