Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7f30abc58edd2e0…

MALICIOUS

PDF

93.5 KB Created: 2021-03-21 01:09:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 95587625ba0718635a9f835d95134a43 SHA-1: d27438ebaf8a0dc99299d8a67f823c8c4d2018a2 SHA-256: c7f30abc58edd2e0d9c1bf0034d73a6ba3fe13a687af80938f5483f32a7f8392
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, contains text related to search keywords, suggesting a lure to phishing or malware download sites. The presence of multiple disposable hosting links further supports a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/wix?keyword=5e+gems+by+value PDF link annotation
    • http://twoup-viktoria.online/nifudateraborip9kih.pdfIn PDF document text
    • https://cdn.sqhk.co/vorinugobol/ghhjhiE/bloons_super_monkey_2_hacked_version.pdfIn PDF document text
    • http://mogurasubep.22web.org/zubenezitiviteluwulogil.pdfIn PDF document text
    • http://ezfix.asia/academic_english_reading_and_writing_across_the_disciplines_2018_free_download72je4.pdfIn PDF document text
    • https://cdn.sqhk.co/bofotabi/8hYgegf/armored_car_hd_racing_game_download.pdfIn PDF document text
    • http://ig-copyrightnotice.com/words_to_describe_sunbeammhx1l.pdfIn PDF document text
    • http://m-ryanaf.site/54740532591cg09w.pdfIn PDF document text
    • http://stylecurtains.com/pajezakekmz6lo.pdfIn PDF document text
    • https://cdn.sqhk.co/kuniremolu/bhehpjf/jigarthanda_ding_dong_theme_music_download.pdfIn PDF document text
    • http://gta-msk.ru/color_and_light_absorption6uqku.pdfIn PDF document text
    • http://graatorama.space/80818987598kiib4.pdfIn PDF document text
    • http://joteruzawareba.iblogger.org/insulation_for_sheet_metal_duct.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/hdijgij/walolufazilisare.pdfIn PDF document text
    • https://cdn.sqhk.co/vigesiji/Vhfjcgf/a_dance_of_fire_and_ice_discord.pdfIn PDF document text
    • http://uaportal.site/powuwwh658.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381788/normal_60520b8a8db8d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453901/normal_5fe516f21a503.pdfIn PDF document text
    • http://xtreme-sport.ru/jiximorozigafofafmzde.pdfIn PDF document text
    • http://opensol.xyz/31227723559w1sek.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/bubeto/area_of_triangle_sine_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/letutatijebaruriviw.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/nojiwerodijewokusinikejum.pdfIn PDF document text
    • http://suxikikafib.epizy.com/devexpress_report_mvc.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/gataburojugaputuv.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/sudatudekobo.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_off00012e5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E5D 5240 bytes
SHA-256: 0dbb1ebb930db6c62538683d921cc0b186c96d176b1bf9c9547ae86dcf4901b2
font_01_sfnt_off0001402f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1402F 11948 bytes
SHA-256: 9149cb2165f82bb97690effba57cc74ed0aaf0087f3cb26bf68c0586f0266dfc

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