Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e09a3a7755c0a1a…

MALICIOUS

PDF

84.5 KB Created: 2021-03-08 04:57:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 96d9b116c371e73084e41a16e66d349e SHA-1: 384831684eed6e8cd6ce476d8369024c19aab31e SHA-256: 1e09a3a7755c0a1a5b535abeaaf657a8ced883edd9f210713edbf157514cef36
126 Risk Score

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 0.9994

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://resalured.ru/strik?utm_term=ryobi+40v+chainsaw+manual PDF link annotation
    • https://cdn.sqhk.co/gegatuzikat/h9kSPhd/possessed_elementalist_divinity_2.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/diplomacy_henry_kissinger_summary.pdfIn PDF document text
    • http://vumonivaxozutod.mypressonline.com/how_to_make_vanilla_simple_syrup_for_iced_coffee.pdfIn PDF document text
    • https://cdn.sqhk.co/liwewajawab/2giFXIK/mijefokixafevagofos.pdfIn PDF document text
    • http://fiwisud.getenjoyment.net/6.5_creedmoor_load_data_varget.pdfIn PDF document text
    • http://kujinatazema.sportsontheweb.net/can_i_watch_netflix_on_my_panasonic_viera_tv.pdfIn PDF document text
    • http://potuxoposutu.medianewsonline.com/audacity_podcast_editing_tutorial.pdfIn PDF document text
    • http://rezisekuvaz.mypressonline.com/how_long_does_it_take_for_a_person_with_insomnia_to_fall_asleep.pdfIn PDF document text
    • https://cdn.sqhk.co/regavebike/gtgfgjF/xivamejiwem.pdfIn PDF document text
    • https://cdn.sqhk.co/bevurokakug/jcKsigO/88476396693.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e4fb9bf1-a3d6-4767-9bf2-2a1021e5dc09.filesusr.com/ugd/53cfc7_11955d96afe2497d9e255ab5cdbcae51.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba839210-f177-481f-ba18-48a1fb799de4/24954762908.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dca9b793-a5f7-428e-9d48-413b986b1c0c/44624181737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15e102a8-c9ae-49ae-b382-efe1afaa3ec7/borurirafetubutamipeze.pdfIn PDF document text
    • https://a7563df4-ba19-4d82-a8a0-b2470d957038.filesusr.com/ugd/61f964_24ced017326c4ab48af5d67a7c286e62.pdf?index=trueIn PDF document text
    • https://945b3f91-9c76-4178-be32-f0dab3cfe2c6.filesusr.com/ugd/8d5d69_6ef2010d244f4fc6b23ca51a3259cd25.pdf?index=trueIn PDF document text
    • http://guseboses.atwebpages.com/organic_chemistry_2_lecture_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0fe09f3-0e11-4422-9cbd-9c85b74a6314/gogenedawelama.pdfIn PDF document text
    • https://f8d82b49-d438-4da2-b906-f876cb6fe635.filesusr.com/ugd/12dc78_462fd9e38c2043b9bd0be0bd33154847.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc26ba0e-013e-4ced-bf26-a1e4b0c26f96/fubufijag.pdfIn PDF document text
    • https://3ae4d138-4ba3-4962-98fb-1b98b40a6a82.filesusr.com/ugd/38062a_6424c58d20a74e66ab43888c66a791b9.pdf?index=trueIn PDF document text
    • http://lamupimifuban.onlinewebshop.net/what_can_alexa_do_on_fire_tv.pdfIn PDF document text
    • http://lawiferow.myartsonline.com/rofelogedasefileturosaweb.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_off00010d39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D39 5576 bytes
SHA-256: 44d1c83a774373c52c570201bbcd8f73b168e4e2eca0e9a869ce2e7f80d37e55
font_01_sfnt_off00012035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12035 10736 bytes
SHA-256: ca09e0282b476239d113898a9b037148bcf22101f4d1ff5c0879586b9f123bff