Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1279569c761e8c5…

MALICIOUS

PDF

80.0 KB Created: 2021-02-16 04:39:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0178bfcc34b4c10a0b8a1ab565f2917a SHA-1: a6d2195b6eca44ebebeb36578349cd9ba2e34e21 SHA-256: b1279569c761e8c598a55192182f0c0531e2c656c78ac2811884c21fb5ddecbb
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a common phishing lure, likely intended to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/wix?keyword=katarina+guide+s5e1 PDF link annotation
    • https://cdn.sqhk.co/dojarodawiw/jPgf9iw/zomobozex.pdfIn PDF document text
    • http://alternativeinfluencenetwork.net/whatsapp_wallpaper_hd_3d17g4c.pdfIn PDF document text
    • https://cdn.sqhk.co/dodanadofu/Qhaibv5/sniper_3d_gun_shooter_game_download_apkpure.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529697/normal_600c85a85d81b.pdfIn PDF document text
    • http://hayatevesigar.online/square_root_property_worksheet_kutax5gs9.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/jgem0V6/donald_trump_net_worth.pdfIn PDF document text
    • http://wizomokupelew.iblogger.org/application_for_loan_from_office_format.pdfIn PDF document text
    • http://abanca-electronica.com/v_moda_crossfade_2_wireless_reviewmisgm.pdfIn PDF document text
    • http://copyrighthelpbusiness.net/2010_chrysler_town_and_country_touring_optionss9uxs.pdfIn PDF document text
    • https://cdn.sqhk.co/vasozaponem/aN3XhBd/88756598742.pdfIn PDF document text
    • http://podeves.xyz/gabriela_clavo_y_canela_jorge_amado6jofq.pdfIn PDF document text
    • https://cdn.sqhk.co/lexoxuxoluvi/EURheQj/sezanewezur.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/Jhejihi/send_files_to_tv_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/gijzJic/gufat.pdfIn PDF document text
    • http://bufenukaje.22web.org/converting_fractions_to_decimals_worksheet_math_aids.pdfIn PDF document text
    • http://inostrana.com/56225603504335fv.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizilo/SiiLii4/sotesugikufepimulu.pdfIn PDF document text
    • https://cdn.sqhk.co/patagarinixa/LhdheQQ/mixed_fractions_calculator_3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sesisat.epizy.com/3883960802.pdfIn PDF document text
    • http://zizajaw.epizy.com/25045792665.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_off0000fe19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE19 5104 bytes
SHA-256: 9e7c88e2eb028db0160fcea7f527cccafd0d6f0dd7674aec5392f46bc182c6bb
font_01_sfnt_off00010f93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F93 10240 bytes
SHA-256: 94d20cbf7d739c47042ac8f0f72c6f0ba97adb042eafc65249e52a5efbfe6210

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