Malicious PDF — malware analysis report

Static analysis result for SHA-256 1657312c174e30fe…

MALICIOUS

PDF

75.2 KB Created: 2021-05-11 06:53:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d8cbd76bc18e47e7f7778f7c9b9d9114 SHA-1: 3e0d960980232c9f4fed620e3bc6368b748f342c SHA-256: 1657312c174e30feb9f4f9c0b607494960674f62cc8655c5fd7af6facb40104b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9993

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://kuzutuzo.ru/strik?utm_term=how+to+hard+reset+a+kindle+fire+7 PDF link annotation
    • http://fredo.bike/rerufesapwfv0m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450037/normal_6062d2af1b459.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411696/normal_605dc8c654222.pdfIn PDF document text
    • http://matroskin.space/liverpool_real_madrid_2009_formazionip493w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495839/normal_600d9a5d7c6ff.pdfIn PDF document text
    • https://cdn.sqhk.co/kukisigafumi/j2T0dVG/weekend_warrior_toy_hauler_remodel.pdfIn PDF document text
    • https://cdn.sqhk.co/kigimole/gdgc5Oh/motor_matic_touring_2020.pdfIn PDF document text
    • http://souve.me/555_timer_astable_circuitn69pa.pdfIn PDF document text
    • http://generatorsale.ru/rirux0z73n.pdfIn PDF document text
    • https://cdn.sqhk.co/woteruzid/gigjgjK/summoners_war_3_star_tier_list_2019.pdfIn PDF document text
    • http://optamorem.com/automated_payroll_systems0q6b.pdfIn PDF document text
    • https://cdn.sqhk.co/wisaputal/fjdPGbC/rugby_world_cup_2019_live_stream_itv.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/figcgcH/color_of_the_night_1994_full_movie.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://46ebecaa-9490-439b-bba6-ee77f1a6ca93.filesusr.com/ugd/cee8a1_a1968953d79c4d96ad589fad8b902b3b.pdf?index=trueIn PDF document text
    • https://a867a740-3546-49c9-bb92-c76f735cad7e.filesusr.com/ugd/c312ff_2beda6b3509e453d8bfe0f1ae0b923e9.pdf?index=trueIn PDF document text
    • https://b19b3b79-9ae2-4e99-9b16-ef32671d60f4.filesusr.com/ugd/0bc867_4b5eeed0874b48d2aeb1f6e24096daa6.pdf?index=trueIn PDF document text
    • https://2aa89031-56ac-4de1-b828-aabe99840ec8.filesusr.com/ugd/cf14a4_2409ecd33bb544868085f373a722111e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba2925d2-e17a-45bd-8151-833bd70fb8e6/husqvarna_hu725awd_engine_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/525c5cd7-ed79-4504-89e6-d15254c34ff4/68450416161.pdfIn PDF document text
    • https://9170d309-caca-4186-8987-bf6b40ce219c.filesusr.com/ugd/baef12_a73fd9e107a54260adab5e9b147ae6d3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3e06d1e-2f83-411a-a406-c74f3009097d/93101216607.pdfIn PDF document text
    • https://c0771fee-1ba5-4dbf-bba5-a775c3d44c03.filesusr.com/ugd/544e7e_f5856949e3a04ae88b69982dbea4d166.pdf?index=trueIn PDF document text
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_7175dc77df8e45408df2e190def9db8f.pdf?index=trueIn 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_off0000e695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE695 5192 bytes
SHA-256: 160ca2ba25f39f4720d11132982ace2e669d72d935d482874b1a20c6af8d8c0e
font_01_sfnt_off0000f850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF850 11484 bytes
SHA-256: db4786846d9f49203b011f83bb0fca643ce5c5e9b79e31bbbbf190344bcf972f

Open this report in the interactive analyzer, or submit your own file for analysis.