Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7b59683db9f5f59…

MALICIOUS

PDF

71.1 KB Created: 2021-02-24 08:07:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: ad181a8e1dedd80c112e43c10bdd1c84 SHA-1: 79fb95ca3a75de313662126fe00a45533f030d72 SHA-256: b7b59683db9f5f5942ec3a11cb50eabddbf51dcdaeb155c3ab9f2acd1e122262
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://baarspo.ru/wix?keyword=contemporary+society+an+introduction+to+social+science PDF link annotation
    • https://pumutetigowon.weebly.com/uploads/1/3/4/6/134699291/jiwojuxazomuwiz.pdfIn PDF document text
    • https://cdn.sqhk.co/mozepemera/iaygejg/real_gangster_street_crime_vegas_2020_mod_apk.pdfIn PDF document text
    • https://pazarufawituxib.weebly.com/uploads/1/3/4/0/134000032/wosozododego-mawenemukale-sizaf-bepotilesove.pdfIn PDF document text
    • https://fosobezi.weebly.com/uploads/1/3/4/8/134898374/0fefcfbdb886.pdfIn PDF document text
    • https://pakosikan.weebly.com/uploads/1/3/0/7/130740558/1279.pdfIn PDF document text
    • https://todilotifobaw.weebly.com/uploads/1/3/2/7/132712516/4492582.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/hbgBgcy/consulting_math_apps.pdfIn PDF document text
    • https://cdn.sqhk.co/notenirikev/MmiaQch/vevevomivogonikelibuforu.pdfIn PDF document text
    • https://cdn.sqhk.co/zukuxenopo/Bg1jdgc/black_widow_bite.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/xighfSP/viral_tiktok_songs_october_2020.pdfIn PDF document text
    • https://gobodukigibab.weebly.com/uploads/1/3/1/8/131856162/kotodarawomuburu.pdfIn PDF document text
    • https://cdn.sqhk.co/jojikoxazew/iihx5fe/61019483296.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382965/normal_5fcbde2c78a6d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000db5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5F 5228 bytes
SHA-256: c4ba69a84153c2e2b4e9129ff83e83d7033b416de0ddd478e809032e937d1ce6
font_01_sfnt_off0000ed0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0F 10040 bytes
SHA-256: de5e018cbb88f92f9993f6b4947cb0686115425cfe6b41d2fa15c476da61ccc3