Malicious PDF — malware analysis report

Static analysis result for SHA-256 91595cec1ca7642f…

MALICIOUS

PDF

82.9 KB Created: 2021-03-05 07:48:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 06ab9096a555411644d032282f5ddc8e SHA-1: dc3a0b060b4fb1420d3b0234e9fb5010890cd108 SHA-256: 91595cec1ca7642feaad1ea9fdc2e86ee512b002a5644b51e90dfb21e59286be
186 Risk Score

Malware Insights

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

This PDF file contains a link farm designed to redirect users to numerous other PDF files, likely for SEO manipulation or to host malicious content. The primary lure appears to be a fake movie download, as suggested by the embedded URL and the document body's reference to 'maze runner 3 full movie google drive'. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/award?keyword=maze+runner+3+full+movie+google+drive PDF link annotation
    • https://cdn.sqhk.co/fuzomorikat/jjLjdHL/nwn_cleric_fighter_weapon_master.pdfIn PDF document text
    • https://firunonosud.weebly.com/uploads/1/3/6/0/136052948/liketam_wifad_vusumadaz.pdfIn PDF document text
    • https://cdn.sqhk.co/sezepemanu/dNgcuGD/46073766855.pdfIn PDF document text
    • https://jonimewogil.weebly.com/uploads/1/3/1/8/131860125/6371786.pdfIn PDF document text
    • https://cdn.sqhk.co/kixagixupo/FieXRjc/grand_mountain_adventure_snowboard_premiere.pdfIn PDF document text
    • https://cdn.sqhk.co/jelasusoved/gjgyX30/jazzmeia_horn_i_remember_you_lyrics.pdfIn PDF document text
    • https://wawupibinotab.weebly.com/uploads/1/3/4/9/134900246/debutabojutes_lodozutoxow_kelafixolivev_niwevawujarer.pdfIn PDF document text
    • http://mifukuvij.iblogger.org/compare_zoom_h4n_pro_and_h5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://538d8494-0c7d-401a-b890-0485f6bc7bca.filesusr.com/ugd/29c71c_ce9180e6cec540478375aae6d4fe5ee0.pdf?index=trueIn PDF document text
    • http://nawogov.epizy.com/242384423.pdfIn PDF document text
    • http://ribaxekag.epizy.com/italian_flag_images_free.pdfIn PDF document text
    • https://728bf1be-24e3-4891-ba98-fedceca1a503.filesusr.com/ugd/3268c8_e53552e66076451385370fbeac575d4c.pdf?index=trueIn PDF document text
    • https://f72b89be-0fa6-41ee-8162-331329ef78ce.filesusr.com/ugd/95089d_3e047d97f46f4b1da683d6a527e92ba5.pdf?index=trueIn PDF document text
    • http://mimodiko.epizy.com/aws_consolidated_billing_report.pdfIn PDF document text
    • https://c0b8f06b-4e98-4d3d-89ef-2f08caba629a.filesusr.com/ugd/0c8cc8_f52b87a07bbe4f979f78e9f109f5cac7.pdf?index=trueIn PDF document text
    • http://zadiriraki.epizy.com/diehard_portable_power_1150_charger_cord.pdfIn PDF document text
    • http://xafuvarajuxeg.epizy.com/big_little_lies_trailer_youtube.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_off000106c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C6 5328 bytes
SHA-256: be80ed9d12099d41def2dedf66b25c4133cd36eb59779ef98261bc7dce5cd8fb
font_01_sfnt_off000118f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F7 11084 bytes
SHA-256: 8e0dce4c95fdc5ac89c18e82eaa76f32b989da17de86a9bf865393ec69e56193

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