Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4ac91ad838268dc…

MALICIOUS

PDF

79.1 KB Created: 2021-05-04 02:57:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 25b4db1d9b2ea36e2801718c6989f9fe SHA-1: b35d9d3dfeeaa89af96b7eee8617997e7f1f0e76 SHA-256: e4ac91ad838268dc4c157a377856fcae21d02d02d71dd683606b714fcac96a21
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 0.9995

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://bologen.ru/strik?utm_term=moultrie+infrared+not+working PDF link annotation
    • http://tomogorman.com/rio_learning_to_fly_bookq3gi5.pdfIn PDF document text
    • http://sarupunojupud.sportsontheweb.net/boiler_control_systems_engineering_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414166/normal_606b3548dfdf4.pdfIn PDF document text
    • http://soinjaga.ru/24233759844gpbjv.pdfIn PDF document text
    • http://gagapazu.scienceontheweb.net/bush_pin_type_coupling.pdfIn PDF document text
    • http://zaparipajomigi.scienceontheweb.net/65119567759.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387924/normal_6035bf89564c2.pdfIn PDF document text
    • http://wigosixozem.mywebcommunity.org/total_war_attila_guide.pdfIn PDF document text
    • http://bumefivaloso.scienceontheweb.net/lulasesofikuk.pdfIn PDF document text
    • http://sluzhba1.net/infosys_technical_interview_questions_for_fresherscwmtm.pdfIn PDF document text
    • http://chelamela.org/vermont_castings_radiance_rnv40_manualvm6d8.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/roserutafipebebulebutele.pdfIn PDF document text
    • http://meetsucre.pro/grief_worksheets_therapy9aqud.pdfIn PDF document text
    • http://xuribof.medianewsonline.com/turepogiworudafelo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393779/normal_600ad887c4fc4.pdfIn PDF document text
    • http://marifivelaj.mygamesonline.org/18074504249.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://faxiruvud.myartsonline.com/blouse_cutting_pattern.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/51553739018.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/92807501175.pdfIn PDF document text
    • http://pojozija.onlinewebshop.net/walking_dead_graphic_novel_193.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/electronically_stored_information_frcp.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/anna_karenina_in_bengali.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA2 4940 bytes
SHA-256: 2ad06ea706328f23e5be920ab146b8aac17e2f7775c2027a02e71caab9684d95
font_01_sfnt_off0000fd99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD99 10212 bytes
SHA-256: 08384aed763264ea751fbc7a81784691aeb0ea260665d82f2d8feda1bfe16cb6
font_02_sfnt_off00012077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12077 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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