Malicious PDF — malware analysis report

Static analysis result for SHA-256 a292e11227c16829…

MALICIOUS

PDF

76.3 KB Created: 2021-03-12 07:31:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: d2e2f685f8e1b1edf9fb9b866caf9252 SHA-1: 5a6b050d4d3a2ddbb33eaf2cafe0ac63f41eeec4 SHA-256: a292e11227c16829782ac2c81ba468cb808ddb112e2bd25c1223236a02f0819b
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are hosted on disposable domains and appear to form a link farm. One prominent URL points to a file related to an Android PSX emulator, suggesting a lure for potentially unwanted software downloads. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://jacksth.ru/wix?keyword=fpse+%252B+bios+emulator+psx+for+android+.apk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4496592/normal_5ffe55695b45c.pdfIn PDF document text
    • https://cdn.sqhk.co/kutajanode/iia0jds/carmel_by_the_sea_restaurants_michelin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390374/normal_6035860891b04.pdfIn PDF document text
    • https://cdn.sqhk.co/juvanejejuwo/iS7hghb/handmade_bird_feeders_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473340/normal_60435c39a1b95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471455/normal_6015b4a95bb2a.pdfIn PDF document text
    • http://evakuator-uga.ru/pecoricco_formaggio_canestrato_primo_saleevv3h.pdfIn PDF document text
    • http://003-center.ru/742293272099fiwm.pdfIn PDF document text
    • https://cdn.sqhk.co/norowitidot/xKheMhe/dragon_wallpaper_hd_for_laptop.pdfIn PDF document text
    • https://cdn.sqhk.co/babonisu/ekSVhij/petikobogalenewer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402949/normal_5ff1b19f38041.pdfIn PDF document text
    • https://cdn.sqhk.co/gopepilexafi/cjgrbia/94037321640.pdfIn PDF document text
    • https://cdn.sqhk.co/xapawavuma/OvBiahj/47457717575.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416326/normal_6049a108dadfd.pdfIn PDF document text
    • http://stroymarketmetal.ru/how_to_cook_cornish_hens_in_a_roaster3os0i.pdfIn PDF document text
    • http://itmax.info/learn_tailoring_online_free_for_beginners_in_hindisviyl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481055/normal_603c7488dfe47.pdfIn PDF document text
    • https://cdn.sqhk.co/pivogokixej/ihgjoni/pac_man_256_pc_descargar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/98671824756.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/arcsoft_photostudio_2000_free.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_off0000eb68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB68 5448 bytes
SHA-256: 56aedbcb1c2b1e7040b93e2bf2421c1e9a19665b86acf9f5b97a35363c7c32f1
font_01_sfnt_off0000fddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDB 11252 bytes
SHA-256: 1f40f223eca37a2239250851af92b67597f2cf89d41e30ad01e54bee48af4f12

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