Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ae161e210c14e19…

MALICIOUS

PDF

78.3 KB Created: 2021-03-14 23:18:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9a140e01d6006022b44e33786a744aaa SHA-1: f885db598b4e4876abe8f5a56fb7c27eac046627 SHA-256: 8ae161e210c14e19cbaf493f5e845588de52b81ebb2687932552eb39f21b5e82
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically appearing as a search result lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of many disposable hosting links suggests a link farm designed to obscure the ultimate destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/strik?utm_term=can+you+build+muscle+on+bowflex PDF link annotation
    • https://cdn.sqhk.co/sezibagigi/W4hgzjg/2nd_grade_common_core_math_word_problems_worksheets.pdfIn PDF document text
    • http://mainsale.info/duxijotuwarazefaj3rg5z.pdfIn PDF document text
    • http://wisajekunitope.22web.org/70089130653.pdfIn PDF document text
    • http://fc-aromat.ru/artemis_fowl_the_arctic_incident_characters96b96.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/Ngjgcgd/bsp_fiji_mobile_banking_app.pdfIn PDF document text
    • http://creditscoretracking.info/how_to_draw_flowers_for_beginnerstmqy2.pdfIn PDF document text
    • http://cosmeteca.com/femosulokikozwtf9v.pdfIn PDF document text
    • http://jushq.club/72653467404h86dd.pdfIn PDF document text
    • http://24goodstore.site/west_game_app_wiki4ngf3.pdfIn PDF document text
    • https://cdn.sqhk.co/kobewudojuvo/iajjMhj/airport_companion_pass.pdfIn PDF document text
    • https://cdn.sqhk.co/rexazileka/siegf74/38016406782.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://werolalijatet.rf.gd/android_studio_debug_on_device_not_working.pdfIn PDF document text
    • https://7fd672c9-0ac8-42d3-9d3c-9ebb2fbea2b4.filesusr.com/ugd/92785a_2ebe4c43fd3b4101ae7c1b11f639ba6b.pdf?index=trueIn PDF document text
    • http://getudiweseka.epizy.com/boilermech_holdings_bhd_annual_report.pdfIn PDF document text
    • http://pepebejawu.epizy.com/solubility_curves_worksheet_answers_chemistry_if8766.pdfIn PDF document text
    • http://danofawo.rf.gd/natuped.pdfIn PDF document text
    • https://627f215e-41ba-4aa4-9906-5f9f9d117739.filesusr.com/ugd/8ab72e_e402b216d042492fb1adc2071a5913a8.pdf?index=trueIn PDF document text
    • http://dumudolaba.epizy.com/learner_s_permit_md_answers.pdfIn PDF document text
    • http://gesozep.rf.gd/bobolusatu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF640 5380 bytes
SHA-256: c8594f672c0036ba001f5fd59d1bf28c4bbe33b840ae4d05b54665fb94e38418
font_01_sfnt_off00010895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10895 10456 bytes
SHA-256: c3469bba4b3bb0209022b0579941308ffc7bfa487c5cd5674c46fbadb2ac43f3

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