Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c589189e1a7c356…

MALICIOUS

PDF

110.5 KB Created: 2021-03-10 19:50:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5c5e36002cd0b3667073e18eb4be23f3 SHA-1: 97fcb6081034a09b38a738f419e194d2848d357f SHA-256: 9c589189e1a7c356943370c628b456fd61469a039f3ec8d404aaffb686eab168
186 Risk Score

Malware Insights

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

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 0.9996

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://vilenefex.ru/wix?keyword=assassin%2527s+creed+unity+dlc+trophy+guide PDF link annotation
    • https://womazineput.weebly.com/uploads/1/3/4/8/134895737/dolotupijadazup_sesurizun.pdfIn PDF document text
    • https://vuzigalami.weebly.com/uploads/1/3/5/9/135960382/228675.pdfIn PDF document text
    • https://cdn.sqhk.co/jasurisunav/Qhbijij/arena_football_road_to_glory_ps2_iso.pdfIn PDF document text
    • http://copyrightsupporteds.com/78400456981dyg0t.pdfIn PDF document text
    • https://cdn.sqhk.co/dexizajifu/iehBENY/beard_grooming_kit.pdfIn PDF document text
    • http://neuroncraft.online/what_does_amber_light_on_router_mean7wqbo.pdfIn PDF document text
    • https://mituzeru.weebly.com/uploads/1/3/2/6/132681412/sefonoro.pdfIn PDF document text
    • https://cdn.sqhk.co/pumibavi/n3biebn/cabify_colombia_conductor.pdfIn PDF document text
    • https://cdn.sqhk.co/noneniwetav/hih1Uif/kilagararigobevujaguroj.pdfIn PDF document text
    • https://cdn.sqhk.co/nowovadizeb/jfXMjb1/gifuxezugobupabilarexo.pdfIn PDF document text
    • http://tertov.xyz/fojolojutawanafesivojaxooz5hb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b962d5b8-8819-42e3-9ba3-d95e8366760e.filesusr.com/ugd/f51585_05592fb8fe7c42c68c9d2cc97962cf17.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/246052f3-1d42-412f-b429-64ee92fd0443/most_uncommon_last_names_in_australia.pdfIn PDF document text
    • http://lilufunom.epizy.com/lumexutokilebujokupigoket.pdfIn PDF document text
    • http://wavivexudis.epizy.com/do_air_force_get_paid_more_than_army.pdfIn PDF document text
    • https://f733e552-90a1-4d1f-83ca-a6b36afcf31c.filesusr.com/ugd/38bf1f_e08fde9b6ef74816b642d3d2c354f116.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c08b2efe-a7c4-4807-b6a6-91b7ba6ea982/arturia_microbrute_se_manual.pdfIn PDF document text
    • https://6440a9f6-5e82-4153-977b-4ffe9374ec4a.filesusr.com/ugd/7182f3_8f5873da7b9542bb8b2b60284e6904bb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0de0f86c-12fc-4725-b175-1ad1e0573708/classic_salmon_fly_tying_materials_for_sale.pdfIn PDF document text
    • https://dca540c6-954d-4243-9f09-0921753db957.filesusr.com/ugd/974a4e_0845ad89aa7143538b1b25d189b190d8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8179dcd8-6a31-44b0-a333-a33b55a4a4a2/how_do_i_get_my_ham_license.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_off0001735b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1735B 5460 bytes
SHA-256: ea68bff9699c60cc8dab0bfe5ecd7c0cce8b303f26638c3a996e298af6b3de78
font_01_sfnt_off000185f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x185F4 11360 bytes
SHA-256: 638e3f2e774e563726ad3ed3fb66304cad45213b8d53ee358a9644eded612aa4