Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb8a77a87a54dc45…

MALICIOUS

PDF

78.3 KB Created: 2021-03-20 01:14:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a1690ab24142a61bf7b8afb528896e2f SHA-1: 59ca6c8a9c1d92d9d8a02a62f790dafd3176035e SHA-256: cb8a77a87a54dc45234fcb6661a02ab247c8c9b5790c0fd7a9c791b6a81ac048
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 0.9998

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://dafemum.ru/strik?utm_term=is+sweet+corn+healthy+for+weight+loss PDF link annotation
    • https://cdn.sqhk.co/xobetetivuzi/jithghb/amplifier_software_for_pc_speakers_free.pdfIn PDF document text
    • http://birjand.design/comparing_and_ordering_fractions_worksheets_grade_4kha7x.pdfIn PDF document text
    • http://presentinsta.site/john_deere_100_mower_deck_partsb942k.pdfIn PDF document text
    • http://tiktokcopyrighthelpteam.com/76141168392dimi9.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/55340916025.pdfIn PDF document text
    • https://cdn.sqhk.co/wuladupuzo/jdjgshb/clock_face_printable_free.pdfIn PDF document text
    • https://cdn.sqhk.co/timadupak/herLji4/flight_pilot_simulator_3d_free_game_download.pdfIn PDF document text
    • http://waduresiwiboba.iblogger.org/73521774875.pdfIn PDF document text
    • https://cdn.sqhk.co/nomelafu/rrW9uia/bumunedeza.pdfIn PDF document text
    • https://cdn.sqhk.co/tesadubozino/elicuIX/modern_warfare_3_gun_sounds.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dekifovep.epizy.com/bajirao_mastani_full_movie_yify.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17a37480-2671-40e5-ba33-26d7a291cc7c/where_can_i_get_safety_glasses.pdfIn PDF document text
    • http://sabiwilurase.atwebpages.com/volando_sobre_el_pantano_audiolibro.pdfIn PDF document text
    • https://ad9e3d1f-bb22-46ca-892e-b6aa3325a756.filesusr.com/ugd/837d34_9874c778ec2546b5abd42f7c277da71c.pdf?index=trueIn PDF document text
    • https://02bc4616-4eae-4b38-b2c9-0e654f754ee0.filesusr.com/ugd/069df5_7683e1ceb9ea4ef2a449da27f8ff1878.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/78cd280a-636c-4e02-a7aa-532ae6b239eb/call_of_duty_cold_war_free_upgrade_to_ps5.pdfIn PDF document text
    • http://tanebani.epizy.com/metodo_bossa_nova_guitarra.pdfIn PDF document text
    • http://wubunulawu.rf.gd/adam_clarke_bible_commentary.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_off0000f5f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F6 5276 bytes
SHA-256: 4e6c14f897289e3c976773542042f07d17478c3313aff9a74a4fce4c96c3c4eb
font_01_sfnt_off00010803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10803 10700 bytes
SHA-256: 00d5fae75538eab5353f4c559130a5ef124ffc0bd18b3a140018f09a8763db5c

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