Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2b256a11a90598e…

MALICIOUS

PDF

84.6 KB Created: 2021-02-17 00:21:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 29b55feee6635bcea2b9cb4e02230beb SHA-1: de3e6286a24ada029d3101061f705ab6bd691f3b SHA-256: a2b256a11a90598ebcd52eeac04e43f9b8ce2fba26764c48115b27f9a2c3cfec
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting and redirector infrastructure, indicating a link farm designed to distribute malicious content or phish users. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to known malicious infrastructure. While no scripts were extracted, the structure and numerous links suggest an attempt to redirect users to malicious sites, likely as part of a phishing campaign or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://yafferge.ru/strik?utm_term=que+dia+%25C3%25A9+feriado+de+carnaval+2020 In PDF document text
    • http://prizyivnik.ru/zeletilonivigifakozebohoqka.pdfIn PDF document text
    • http://kokulet.22web.org/3d_video_player_app_apk.pdfIn PDF document text
    • http://xviiivbgz.com/vazobujozunujidipu11vpx.pdfIn PDF document text
    • https://cdn.sqhk.co/mijajijem/OQgdgj7/we_are_crossing_jordan_river_lyrics.pdfIn PDF document text
    • https://zazibarem.weebly.com/uploads/1/3/0/7/130775746/suridokete.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500882/normal_600ff5903f889.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377642/normal_5fcc93119bbfe.pdfIn PDF document text
    • http://zedanipon.iblogger.org/behen_hogi_teri_movie_songs_mp4.pdfIn PDF document text
    • https://cdn.sqhk.co/rifelefiw/jjdBjGg/rexapa.pdfIn PDF document text
    • https://nusuvonofa.weebly.com/uploads/1/3/1/8/131872273/3323658.pdfIn PDF document text
    • http://dojolegi.22web.org/camera_effects_platform_for_instagram.pdfIn PDF document text
    • https://cdn.sqhk.co/pasivuzuke/yHniegd/tower_of_llama_game.pdfIn PDF document text
    • https://zafewogi.weebly.com/uploads/1/3/1/4/131407253/4337142.pdfIn PDF document text
    • http://kieverts.xyz/kopebovozojisuxakanol2fa8.pdfIn PDF document text
    • https://demujerifusa.weebly.com/uploads/1/3/1/4/131437649/92f806a78.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481409/normal_5fca288b8cfad.pdfIn PDF document text
    • https://cdn.sqhk.co/mibemofega/Tih7reY/witomasawivaromesovite.pdfIn PDF document text
    • http://bahis-sikayet.com/nawujinz6acn.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
    • http://wafovon.epizy.com/properties_and_reactions_of_hydrocarbons_lab_report.pdfIn PDF document text
    • http://nivawuxiki.rf.gd/asset_allocation_form_for_employees.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_off0000fbf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF3 5176 bytes
SHA-256: a7d74f5d363b56ed87f21e77894ea1028653f002618f394b19808400c9d652b0
font_01_sfnt_off00010d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D53 12860 bytes
SHA-256: b1fef7bc25885a2d90b7df7899268cf4e5db6aec12434c685df8d85e7342e32e
font_02_sfnt_off00013489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13489 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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