Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e4afb1bab657608…

MALICIOUS

PDF

83.0 KB Created: 2021-03-14 13:16:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 4487af729e28eac733f55456641cdac4 SHA-1: a6a0e9cefeb12d02f07ec918d22a2f00b109b008 SHA-256: 6e4afb1bab65760825e2cf7a143fb1aaf5e1eb9d1bae961f1eaa6d9bfa2c5b47
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URIs pointing to external websites, with one specifically identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of external links suggests an attempt to redirect the user to a malicious site.

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://lozipotod.ru/wix?keyword=2003+yamaha+v+star+1100+tire+size PDF link annotation
    • http://onsideball.info/honda_hsaf_6500_generator_specsp3xnh.pdfIn PDF document text
    • http://matcobzor.ru/boat_co-_ownership_agreement_template6u64k.pdfIn PDF document text
    • http://dvestideyli.xyz/paris_chainsmokers_song_mr_jattfbk1m.pdfIn PDF document text
    • http://fufirewavit.getenjoyment.net/how_many_points_is_an_army_achievement_medal_worth.pdfIn PDF document text
    • http://vereffka.xyz/85422571087om4py.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/1705d5de-d125-41c1-bec9-d2ca98b04291/place_value_worksheets_year_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca91e6f8-6748-47a0-b5da-a26e1bff635b/64992277244.pdfIn PDF document text
    • http://kinikodiraxo.rf.gd/marvelous_designer_cloth_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0520c436-ac46-4142-8625-87001d4f78db/98780574357.pdfIn PDF document text
    • http://futikuzita.onlinewebshop.net/tamenoseta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0845591-c04d-467d-ae8a-3a0b6e947494/wifesow.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/tepexawiwovewuvoro.pdfIn PDF document text
    • http://teropisarazo.myartsonline.com/sword_art_online_alicization_lycoris_playable_characters.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/91874192860.pdfIn PDF document text
    • http://kuxoxulid.epizy.com/58654726897.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/vuzodekexafelibum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64ffc93c-5588-4ddd-9df8-b592fc01d08a/which_countries_passes_through_tropic_of_cancer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/232fddf9-e522-4f2c-bb4c-3c798f415b56/powerback_5250_generator_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/69681256670.pdfIn PDF document text
    • http://noporotosodapo.epizy.com/catalogue_oriflame_mars_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe873055-1730-4171-af95-f61029dba7ae/lorevejevatubapibud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaa375e7-f817-4a75-a578-b9b9c3e9cc7c/pilgrims_progress_book.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_off00010457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10457 5500 bytes
SHA-256: 3b832274929a19ee7417f928711851095306925863eb912cf5c8b01a78a9ddde
font_01_sfnt_off000116f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116F7 11152 bytes
SHA-256: 232fe0757fc28239aaca279d6d82a275b1fc1429ccc9914c8e4d935a028abfad

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