Malicious PDF — malware analysis report

Static analysis result for SHA-256 9efd7413bdad1929…

MALICIOUS

PDF

96.5 KB Created: 2021-04-01 18:29:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3ce0d06b610d5a7d3f089771a3360ed1 SHA-1: 9059d3fe2115253c37b254224a0812a799bf036b SHA-256: 9efd7413bdad1929a5581263d9cc3862b2666c30718de27508b15d0913b5a06a
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 0.9982

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://resalured.ru/wix?keyword=manual+graters+for+food PDF link annotation
    • http://hook-up.fun/howls_moving_castle_theme_song_piano_sheet_musicpycty.pdfIn PDF document text
    • http://italysummer.space/balveer_natak_ringtone21p6e.pdfIn PDF document text
    • http://vumexovuvelafe.medianewsonline.com/are_chocolate_dapple_dachshunds_rare.pdfIn PDF document text
    • http://bu-markett.com/a_streetcar_named_desire_analysis_scene_114nud4.pdfIn PDF document text
    • http://copyrightsafetyhelps.com/lubujarumosazajamutuc680.pdfIn PDF document text
    • http://theharaka.online/33824940222py01f.pdfIn PDF document text
    • http://tuwimig.scienceontheweb.net/23041771076.pdfIn PDF document text
    • http://scoretdho.best/roravunuwonifijuq427.pdfIn PDF document text
    • http://xtrading.buzz/70149473399htye.pdfIn PDF document text
    • http://fisujerekuvij.getenjoyment.net/nonuzaketafubokej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://ad858f6a-7bbb-416d-9365-e04d7986ed9b.filesusr.com/ugd/3c9ac1_b8908abb2dd043e6b6a0ab0931352893.pdf?index=trueIn PDF document text
    • https://a7474f5d-6ec7-41e4-954d-8cb0a6a0c5ec.filesusr.com/ugd/b987d2_32f683237ba84d2197efee95c588cbec.pdf?index=trueIn PDF document text
    • http://suxazetevuzo.onlinewebshop.net/49372596730.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/fuwotapomekidamakonibo.pdfIn PDF document text
    • https://cabae152-0d18-4cc7-9545-8711a89e332e.filesusr.com/ugd/607e04_c6b8272f168e436fa497b973806a7dff.pdf?index=trueIn PDF document text
    • https://3e3188f7-d9e9-48da-9af6-4e6760718ee0.filesusr.com/ugd/4f7562_9c686aa360d94d769c65fb0aee362926.pdf?index=trueIn PDF document text
    • https://f6e2a16f-d004-42cd-8f17-0463e090774c.filesusr.com/ugd/c70c35_9a2ed12a83844076a95291c8fb538929.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/befafuni/video_facebook_private.pdfIn PDF document text
    • https://0e01c86c-6ad9-43de-bc04-b8819f410213.filesusr.com/ugd/73c254_a7269a2727a44646b7586364fbb5ca59.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/17703913346.pdfIn PDF document text
    • https://8d928d4c-4e32-4dc6-8093-d383c90b3cca.filesusr.com/ugd/b5d49c_5490ca16657848b5bdee7c384f1b3344.pdf?index=trueIn PDF document text
    • https://b01ec662-dec5-4f54-b977-8708717d6054.filesusr.com/ugd/07e02c_f52acfedbf8e4eb5943158feb33f4505.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fikuvine/angry_birds_blast_mod_apk_2019.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12222 2960 bytes
SHA-256: 00c0a141202c10936ceac8b8df9df75720096dbedde9c5fde8d9f3447cbb363c
font_01_sfnt_off00012c91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C91 4912 bytes
SHA-256: 8dce18cda9c9f953ef1fbc94f1d9ec1e5c5546e0674935c0faa9d011e5b85b32
font_02_sfnt_off00013d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D53 12164 bytes
SHA-256: fdd371a335f3537b729e56851132ac2f79281d4f83e9f260c6c35c41cb7d37dc
font_03_sfnt_off000165a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165A3 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361