Malicious PDF — malware analysis report

Static analysis result for SHA-256 d98be74d12cd3319…

MALICIOUS

PDF

77.6 KB Created: 2021-02-21 08:27:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 8b415240b1274cb70d49a843af6c4377 SHA-1: a21a863bf78ebfb0cd83ff96bcc44a22b43b9ebc SHA-256: d98be74d12cd33194d14b3b6f8127c39eb275202597fe3f03c35729b3c99432d
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with a prominent one disguised as a download for 'java for minecraft'. This URL, along with others pointing to link farms on disposable hosting, strongly suggests a phishing or malware distribution attempt. The ClamAV detection and ML classifier further confirm its malicious nature, indicating it's likely a phishing trojan designed to trick users into downloading malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/strik?utm_term=download+java+for+minecraft+windows+8 PDF link annotation
    • https://cdn.sqhk.co/difixoruze/LKTrief/rally_championship_gamecube_rom.pdfIn PDF document text
    • https://cdn.sqhk.co/jagawubu/i5gcLtT/dc_comics_superheroes_lego.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/lFZwNie/mcdonald_s_breakfast_menu_hours_covid.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/diejdJO/66627831961.pdfIn PDF document text
    • http://zhenskiizhurnal.ru/mozilla_firefox_filehippo_32_bitwdm9k.pdfIn PDF document text
    • https://cdn.sqhk.co/poronujefino/dRhdjaB/rrhs_bell_schedule_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424630/normal_5fe98214260f5.pdfIn PDF document text
    • http://idealicaitalia.website/25133422968ifoqi.pdfIn PDF document text
    • https://cdn.sqhk.co/mepowokugo/rQghhah/pba_tour_schedule.pdfIn PDF document text
    • http://frasqen.online/what_to_bring_for_vehicle_inspection_nj2gma7.pdfIn PDF document text
    • http://allerlo.xyz/radio_shack_desktop_scanner_antenna2nyzw.pdfIn PDF document text
    • http://gatorama.site/pichuva_kaththi_tamil_video_songscmsi2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tetenifeme/botanical_names_of_fruits_list.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/94234605892.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/19548098896.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/84082086550.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE590 5376 bytes
SHA-256: 8dde31018f3bc7d1fd10ae5b8027a75391bc0cc25220be062a9958163b5677da
font_01_sfnt_off0000f7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D5 10208 bytes
SHA-256: 551194a86a3519f53ecf92604e487ca6f15e78209ed4deb72f4ac057e7398e36
font_02_sfnt_off00011abe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ABE 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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