Malicious PDF — malware analysis report

Static analysis result for SHA-256 3564a94b5abad53b…

MALICIOUS

PDF

71.5 KB Created: 2021-03-23 18:15:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6bb0e9ae9f4d63c0bef4328e2e12e178 SHA-1: 6842acdce9c882d8c915843ecb98ced6b80a4b05 SHA-256: 3564a94b5abad53bbb978114009819df238c87edeed5a418c1ee774cbd24cb12
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to a site that appears to be a lure for game walkthrough information. The presence of many links on disposable hosting suggests a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://crophysi.ru/strik?utm_term=final+fantasy+13+walkthrough+gamefaqs PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4493541/normal_5ff4a64cbd386.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453906/normal_6057b3366483d.pdfIn PDF document text
    • https://cdn.sqhk.co/lizupasepafu/hhe9Wjb/49691206423.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387706/normal_5feec02ac9b7f.pdfIn PDF document text
    • http://moymagazin.xyz/excel_weekly_employee_schedule_template_freem4ms2.pdfIn PDF document text
    • http://rcasino.info/2010_dodge_caliber_dash_light_meaningsvwk4m.pdfIn PDF document text
    • http://winsl.space/98801428753w4r9n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472774/normal_60133fe7708e0.pdfIn PDF document text
    • http://seplafond.xyz/norton_defined_school_community_relations_asp0r90.pdfIn PDF document text
    • http://thesimplycompleteseries.com/partition_piano_julien_dor_sublime_et_silencel2hml.pdfIn PDF document text
    • http://2gusevshop.space/black_panther_comicsyorwc.pdfIn PDF document text
    • https://cdn.sqhk.co/torujazelome/RSOjcdm/shop_disney_uk_returns_address.pdfIn PDF document text
    • http://ogranicbio.fun/vivah_video_song_appsbcmia.pdfIn PDF document text
    • https://cdn.sqhk.co/dijogiper/ghcSykW/67269935739.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421476/normal_601ae211c5222.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/919a842c-da62-40f0-ad1d-848ac6928091/titopenumekelizituf.pdfIn PDF document text
    • https://c18d9829-3add-4afa-bc87-35007fe3998a.filesusr.com/ugd/70c1ec_fe1d53e9dd3544a2862300d28fe3a110.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe454020-b9e3-484a-9d4f-ff83260a76ab/lagujibiwopotanonag.pdfIn PDF document text
    • https://52468903-0e2d-47c5-babb-61e1d305d291.filesusr.com/ugd/32777b_51558aa8e12045568177d20d32585401.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e26332de-e174-409d-9f8e-85b0d4e9585b/4594652549.pdfIn PDF document text
    • https://627ea4a7-3f28-4bf3-8c99-6a9da7dacf48.filesusr.com/ugd/1970e2_5019c35cdfdc41db9f01a31061c5c58d.pdf?index=trueIn 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 6

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_off0000d9ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9ED 5736 bytes
SHA-256: 799d3f82f3208d0cdf1f51b3f4f2a66acc63571ebbd2e390eb5381d838c95ee1
font_01_sfnt_off0000ed6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6C 10380 bytes
SHA-256: 0cd03d1cf8495a62d1173520928985b4357079860a03131d2d39e5a5489e4f97

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