Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c69ce28d1552f0f…

MALICIOUS

PDF

74.8 KB Created: 2021-02-25 23:48:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: a128a3fbbc5cf3c0eff4045131194ef8 SHA-1: eb047ff27f66102387de03e355d87ec89813e8c5 SHA-256: 2c69ce28d1552f0f00f0fd5df25cc088059fd35f1e53e0c15fc4eeeb67e29197
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior. While no scripts were extracted, the presence of external URIs and the overall structure strongly indicate a phishing or malware distribution attempt.

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://jottigo.ru/strik?utm_term=flotec+pump+keeps+running PDF link annotation
    • http://xowozumevabig.66ghz.com/ixl_answers_8th_grade_math_z._11.pdfIn PDF document text
    • http://detonic-ordina.website/73997581758s94ow.pdfIn PDF document text
    • https://fapixuguxoga.weebly.com/uploads/1/3/1/0/131070829/207995b.pdfIn PDF document text
    • http://leafester.online/what_is_the_punishment_in_the_7th_circle_of_hell4qeqr.pdfIn PDF document text
    • http://lolkek.xyz/snare_rudiments_sheet_musicrfc9a.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/6nieJTH/carrera_slot_car_track_ebay.pdfIn PDF document text
    • https://jowavuzawevubab.weebly.com/uploads/1/3/2/3/132303017/buzivabu-wazexineleb-jodobomu-majew.pdfIn PDF document text
    • http://edapog.online/82761413142lsi3q.pdfIn PDF document text
    • https://tokegomobox.weebly.com/uploads/1/3/4/3/134314144/fiwasegusipop.pdfIn PDF document text
    • http://sdorovie-sustavi.xyz/lemony_snicket_a_series_of_unfortunate_events_movie_wikifazv5.pdfIn PDF document text
    • http://gbarb.me/la_la_la_bbno_piano_sheet_musicd4kpo.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/sukedil/57934496501.pdfIn PDF document text
    • http://mutojux.epizy.com/admiral_dryer_timer_aed4475tq1.pdfIn PDF document text
    • http://zerujafulo.rf.gd/xununurozoso.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_off0000dabf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABF 4944 bytes
SHA-256: b3579d99ef80adf850ecd4b319e270fb0b54f8e5b0d509f0869d1cc29e6e2267
font_01_sfnt_off0000eb7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7F 10680 bytes
SHA-256: b320b732adcfa916f589e00a9c6e2a8e489f6fbbabc30237757cbea098295d04
font_02_sfnt_off00010fec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FEC 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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