Malicious PDF — malware analysis report

Static analysis result for SHA-256 f061f4f81b1cd867…

MALICIOUS

PDF

83.8 KB Created: 2021-03-19 16:36:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 33186ee86b72a08b92fb8840edcd6c39 SHA-1: 50ede934363d0580df852a35e7b186ce84319fca SHA-256: f061f4f81b1cd8675913d1c439f263581f02d7f75f14cf0b469589c0f21bc2bc
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://golowaki.ru/award?keyword=alkaloids+extraction+from+plants+pdf PDF link annotation
    • https://cdn.sqhk.co/terasovo/hdDhduY/goal_goal_tipster.pdfIn PDF document text
    • https://cdn.sqhk.co/libibajuzumu/ighcr66/miss_montauk_fishing_report.pdfIn PDF document text
    • http://idealslimitalia-oficial.site/dark_sun_5e_2020jcuq0.pdfIn PDF document text
    • https://cdn.sqhk.co/jitegoji/jbgeYhj/star_traders_frontiers_review.pdfIn PDF document text
    • http://pumba.fun/exercise_program_in_formal_attire_crossword_cluebze8l.pdfIn PDF document text
    • http://terem.space/57330790721ocm11.pdfIn PDF document text
    • https://cdn.sqhk.co/wavudasawete/yhagedW/32284516858.pdfIn PDF document text
    • http://kismykeitio.best/95846043751hdh39.pdfIn PDF document text
    • http://urolog.xyz/stihl_line_trimmer_fuel_mixtnpee.pdfIn PDF document text
    • https://cdn.sqhk.co/gexopoku/V23wjf4/79636637868.pdfIn PDF document text
    • https://cdn.sqhk.co/gigatakel/TSchcii/boulangerie_patisserie_paris_11.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lomuwobutuwadim.rf.gd/42484214369.pdfIn PDF document text
    • http://lisowinuxofifok.rf.gd/tejesitex.pdfIn PDF document text
    • http://niruxivu.epizy.com/delusewozebevonuwazudi.pdfIn PDF document text
    • http://kumagubugudaxu.rf.gd/systematics_and_taxonomy.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/dovivipogamipetodanadu.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/old_mans_war_movie_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95b1831a-f21b-4934-a7f8-cce274ae25e2/88789608488.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5607f0d9-4b26-4f95-9d78-16c56f7ab3cc/botufasorojowemuriw.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/solved_problems_on_polarization_of_light.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcc7735c-398c-43b8-805f-182cfeb5bb77/japisu.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_off00010b43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B43 5420 bytes
SHA-256: 1bef710806bc939656febb45a7fbb8848df9f5b552bd785e3eb9f679f8585f44
font_01_sfnt_off00011dab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DAB 10620 bytes
SHA-256: 9023bea0cf986171c8e27a3e793d54d0e45b0399ef2ed91989872fda8ab3dbca

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