Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc7639ef8561182d…

MALICIOUS

PDF

69.5 KB Created: 2021-03-22 14:06:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7cf148ce7fe9de3bc86d63fe568e43c5 SHA-1: 063e17574536a5d20faa2c9fc4ee7146577bf508 SHA-256: fc7639ef8561182d44ede21ca79e0c76587c4615326af67678ee5bc5abe83ab8
126 Risk Score

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 0.9991

Heuristics 5

  • 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 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://dugedepap.ru/123?utm_term=business+plan+proposal+pdf PDF link annotation
    • http://icub.tech/medegijawodunejalidetugo2iv1e.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/hhdIgja/nunotedepimotibojev.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/asbghhV/lean_six_sigma_black_belt.pdfIn PDF document text
    • http://freshka.fun/free_calligraphy_script_fontsbgntx.pdfIn PDF document text
    • https://bigudiwox.weebly.com/uploads/1/3/5/3/135304820/mekibotoworesixosun.pdfIn PDF document text
    • http://help-igcopyright.xyz/kelirobalimutopefisipokn83y.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/i9pjdmq/stick_squad_sniper_battlegrounds_apk_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/hjxhidy/92326145851.pdfIn PDF document text
    • https://cdn.sqhk.co/gijosevozu/aNTieET/35361886903.pdfIn PDF document text
    • http://zubiki.top/clicker_garage_opener_manualpxa5v.pdfIn PDF document text
    • http://generalmassage.online/58274746374trk8x.pdfIn PDF document text
    • https://tafanavudijis.weebly.com/uploads/1/3/5/2/135299899/94ac62f02.pdfIn PDF document text
    • http://tiktokcopyrighthelpteam.com/is_the_moon_surface_hardk3lzs.pdfIn PDF document text
    • http://creditactive.info/57733648692ba4qh.pdfIn PDF document text
    • http://mestikon.online/does_dunkin_donuts_still_have_munchkinsssaye.pdfIn PDF document text
    • https://cdn.sqhk.co/bizufunido/ijgWehh/harvest_moon_oct_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/vunalogivefu/okcPijr/gujonixomu.pdfIn PDF document text
    • http://gogotmif.space/what_is_a_winchester_model_94_30_wcf_worthflkmb.pdfIn PDF document text
    • http://drive4mclanemilwaukee.com/the_tattooist_of_auschwitz_book55njb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://laxakufas.epizy.com/50329101958.pdfIn PDF document text
    • http://jaxuziwemulogel.rf.gd/13565827786.pdfIn PDF document text
    • http://tugojan.rf.gd/13253637991.pdfIn PDF document text
    • http://fatofejeripise.rf.gd/bixutenenule.pdfIn PDF document text
    • http://vevurikadi.epizy.com/onn_dvd_player_universal_remote_codes.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_off0000d565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD565 5084 bytes
SHA-256: 2f765dd375c91ba48e569d5b1e247f35f96caa0ad4beef842aaf19b19cc0d2c0
font_01_sfnt_off0000e6c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C1 9988 bytes
SHA-256: fb66f0d5e41254c7cd91d94dfdd299b109106d33eb1afed3d4b272308c530a60

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