Malicious PDF — malware analysis report

Static analysis result for SHA-256 faffbc020650755e…

MALICIOUS

PDF

75.5 KB Created: 2021-03-10 23:13:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 01f21ef02bfe8acb5439c75678edaf0c SHA-1: 40680e1ae9660372394afc442b2ae7ded3f0fea3 SHA-256: faffbc020650755e6a132fd3513ebea0612483edae702d971b0cbcd5f2950b6b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable hosting, indicative of a link farm designed to obscure malicious destinations. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites.

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://jacksth.ru/wix?keyword=ravnica+allegiance+limited+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413456/normal_602d1ef113b82.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/savukikopasajon.pdfIn PDF document text
    • http://korogesubelokut.mypressonline.com/cuantos_centimetros_cuadrados_equivale_a_un_metro_cuadrado.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383704/normal_5fefccbbe9825.pdfIn PDF document text
    • https://kosonijuzar.weebly.com/uploads/1/3/5/9/135974682/jigolilodeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458621/normal_6045ff575bfab.pdfIn PDF document text
    • http://cabinetsly.xyz/pet_sematary_1989_full_movie_free_download6ljce.pdfIn PDF document text
    • http://otomail.business/how_do_you_say_ariel_from_the_little_mermaidl7u9w.pdfIn PDF document text
    • http://worameruvejaka.mywebcommunity.org/3450124277.pdfIn PDF document text
    • http://nawitebexu.medianewsonline.com/la_biblia_online_catlica.pdfIn PDF document text
    • https://dopakegufa.weebly.com/uploads/1/3/1/3/131384718/7785755.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444357/normal_5fdaf77072d60.pdfIn PDF document text
    • http://deutschebank-meine.com/73266272560qkjn9.pdfIn PDF document text
    • http://ludirobus.getenjoyment.net/togereka.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/xewamejixolefaj/53676114918.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2414964-b59b-4ca1-bcb2-89bb336f2450/gafuwuvewekepifip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e5b4374-2d07-4930-b666-5185f8c2cb32/41183014226.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/what_are_the_characteristics_of_gothic_art_brainly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ce5634b-7dea-4d9f-865b-aa1f3f0c0c2d/45353030774.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/mizonolotojikumunegugaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2bb4cb9-7f6f-41e2-8f68-2732345bf6bd/67058136764.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_off0000ea90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA90 5052 bytes
SHA-256: a4ba38053925bb68c3df4127109ca03a8b69bbfe8f06c1995d464f83a132854e
font_01_sfnt_off0000fbb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB9 10872 bytes
SHA-256: b7827a4484796a7c026c28a00844834927352570e0d01878fca0426d34d97a10

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