Malicious PDF — malware analysis report

Static analysis result for SHA-256 29fca7869a630b0e…

MALICIOUS

PDF

81.2 KB Created: 2021-02-18 06:18:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: b015fbd052b5af15f1ccb8e2031426d0 SHA-1: 8f25fd9687bd5e07e413af1e4327f53a4d282e90 SHA-256: 29fca7869a630b0e361e74ca4c8cfbe74a9c1807ea55946d48b569f130ad05f8
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded links pointing to suspicious domains, with at least one identified as a known malicious redirector. The document body, though heavily obfuscated, appears to contain link-farming content, suggesting a phishing or malware distribution scheme.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=what+happened+to+izzy+in+little+fires+everywhere+book In PDF document text
    • http://stikc.xyz/bose_noise_cancelling_headphones_15_manualz4c7i.pdfIn PDF document text
    • http://kartaidatodemeleri.com/sultan_ldrmek_nzhetin_katili_kimg4ogu.pdfIn PDF document text
    • https://cdn.sqhk.co/semiwewedazi/ihejeif/29348878237.pdfIn PDF document text
    • http://hook-up.fun/xezuxu54t5k.pdfIn PDF document text
    • https://cdn.sqhk.co/dodufiruw/jQAHgeS/siege_world_war_2_hack_mod_apk.pdfIn PDF document text
    • http://carinsusa.info/how_do_i_know_if_my_dishwasher_control_board_is_badr5ugo.pdfIn PDF document text
    • http://myyshooop224.site/plasticity_and_modern_metal-_forming_technologyr673w.pdfIn PDF document text
    • http://xsafak.com/kezakubuge02r6l.pdfIn PDF document text
    • http://strapslap.online/diversidad_cultural_y_linguistica_de_mexicogyqvj.pdfIn PDF document text
    • http://freshnatur.fun/robot_ultimate_dark_dragon_amazing_toy_fightersh2c7a.pdfIn PDF document text
    • http://pollsexpert.com/professional_accountant_cvj5jqo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bivoxubi.epizy.com/audiophile_music_player.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_off000102dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DD 5652 bytes
SHA-256: eaf4ca3a8ba09436890ffdfa213c4f2384d1538646ce57efbbea077352e88b7c
font_01_sfnt_off00011634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11634 9996 bytes
SHA-256: 3660a85491368b6f4134da7662ac3a28edd287e1b3f4e29c0668a4d0a2688257

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