Malicious PDF — malware analysis report

Static analysis result for SHA-256 634bef31b8f47e16…

MALICIOUS

PDF

78.2 KB Created: 2021-02-21 16:45:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e7aeaf804d7ed2c4a8f51a1850127387 SHA-1: 2bfc1d5d61fa1252b8b7c8a4a8d5824387b2d358 SHA-256: 634bef31b8f47e16d4004bcb60a0bd73a79b6ccbbc9aa03dacca59f8b11bf768
184 Risk Score

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://crophysi.ru/123?utm_term=the+andromeda+strain+%25282008%2529+part.+2+dailymotion In PDF document text
    • https://cdn.sqhk.co/posuwumujome/vaja0hf/smart_watch_men_android.pdfIn PDF document text
    • http://drilltech.info/sumerian_cuneiform_alphabet_a-_z_chartaehay.pdfIn PDF document text
    • https://cdn.sqhk.co/nawiwola/igULSZP/texas_holdem_poker_offline_for_android_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/lubigegek/edO7ADc/zombie_city_defense_1_apk.pdfIn PDF document text
    • http://nelitip.22web.org/bhutan_tour_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/juyKjeP/15748905807.pdfIn PDF document text
    • http://genoray.pro/chogada_loveratri_ringtonej3kru.pdfIn PDF document text
    • https://cdn.sqhk.co/wifinalimow/hvf0gha/8632131482.pdfIn PDF document text
    • https://cdn.sqhk.co/mivijigonof/hojcejb/9733560674.pdfIn PDF document text
    • http://waxokuvinati.iblogger.org/coffee_bean_types_information.pdfIn PDF document text
    • https://cdn.sqhk.co/dodufiruw/vjh8Che/word_family_list_grade_2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jebejabekuja.epizy.com/94152753409.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/80758986142.pdfIn PDF document text
    • http://fonajuwowo.epizy.com/inquisitive_rogue_5e_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/bomberman_dyna_blaster_game.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_off0000f277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF277 5904 bytes
SHA-256: 001ed4ee76a36942ca479189c7de8d8958f2c280b4938c8f240d4753a8a7dc14
font_01_sfnt_off0001067c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067C 10980 bytes
SHA-256: c42f59d3f4af372541e8b44a8d5b40554e498c59762f359930aa261b5bd13bba