Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcef7af7114d885d…

MALICIOUS

PDF

80.0 KB Created: 2021-03-28 23:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4e21097d5176ef716dfc5efdc56f7ef7 SHA-1: bbbd6e0fdfefb1f0ee72ee67a3debcf42e449eff SHA-256: dcef7af7114d885d6f97fdc5b4d69dc76310a847454d52ca37cbaf71fc82699f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. The PDF contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of embedded URLs further supports the attack pattern of luring users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://lozipotod.ru/strik?utm_term=eye+of+the+beholder+d%2526d+movie PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409609/normal_603556890b301.pdfIn PDF document text
    • http://creditscoretracking.info/pogomilojifobitobilewaxsuw3k.pdfIn PDF document text
    • http://swiss-gear.shop/what_does_the_song_all_of_me_meane9sbs.pdfIn PDF document text
    • https://xemavuvewo.weebly.com/uploads/1/3/5/3/135394060/4db179.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489414/normal_5fdb0046eec10.pdfIn PDF document text
    • http://xifadezuzurap.medianewsonline.com/60431407664.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485572/normal_603ceab7d6e4e.pdfIn PDF document text
    • http://favunewesazut.sportsontheweb.net/nanevanoripivivadosato.pdfIn PDF document text
    • http://medazuxa.mywebcommunity.org/alternative_energy_systems_and_applications_hodge_solution_manual.pdfIn PDF document text
    • http://jijoxep.getenjoyment.net/certification_sample.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446400/normal_5ff7b837612cf.pdfIn PDF document text
    • https://sawuwirepugasup.weebly.com/uploads/1/3/0/9/130969548/zuxoxunakamof_jetodebi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492871/normal_6034917eea17f.pdfIn PDF document text
    • http://dorightschool.com/ball_bounce_game_app_storemkh2m.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/xezonijida/global_burden_of_disease_report_2019_india.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/sex_secrets_of_the_other_woman.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ea3458c-93e6-43e4-8555-c78d7cc0a5e9/nordictrack_rw200_weight_limit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f17a060-b06f-4d70-bde4-32e0fd8ba04c/jiginokoretowivopejo.pdfIn PDF document text
    • http://zedofaxuboz.onlinewebshop.net/71064554643.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/87873813904.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/autodesk_maya_2013_32_bit_crack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/308363c3-c549-49f6-82de-8b508b923aad/68079146140.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/29992114353.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_off0000f5a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A0 4804 bytes
SHA-256: acb254a40c43b3e1393de37ac12c2bb94667b3d801c7393bcb6a8bcaf937b44e
font_01_sfnt_off000105f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F8 13864 bytes
SHA-256: 1feec3b013388ebcf2072fdff4ae69c76bca946c9015b7a89d63c07683fc81b0

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