Malicious PDF — malware analysis report

Static analysis result for SHA-256 75d1f1a1aaffc639…

MALICIOUS

PDF

77.5 KB Created: 2021-02-25 05:41:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: dadbe4176beff9a7c83ed284e24b1ff7 SHA-1: 5e30fa3ee7eaaeb4318786a7354fec1c7bb62c01 SHA-256: 75d1f1a1aaffc639a7af5cc29d183594269c969f39cb34a90991037e610febe0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://bologen.ru/strik?utm_term=how+to+connect+wireless+speakers+to+onkyo+receiver PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379032/normal_6007bf99e198e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476578/normal_5fcd8ae398347.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494139/normal_5ffcc761bb063.pdfIn PDF document text
    • http://peregukejipesa.iblogger.org/6693398862.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475741/normal_6026c5ea4e4f8.pdfIn PDF document text
    • http://nout-prodat.site/7._0_frp_bypass_apkzowaw.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://mutidulofof.epizy.com/81395933047.pdfIn PDF document text
    • http://kutukisorato.rf.gd/fopiretowupukatomalum.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/tutorial_arduino_uno_espaol.pdfIn PDF document text
    • http://kofujuluzode.epizy.com/91696411325.pdfIn PDF document text
    • http://zazaluvuzusu.rf.gd/20518183484.pdfIn PDF document text
    • http://borovob.epizy.com/botines_con_plataforma_y_cordones.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/boguporabizoxamenawe.pdfIn PDF document text
    • http://gosewobagoxubok.rf.gd/anbe_peranbu_video_song_masstamilan.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE365 4996 bytes
SHA-256: 8489934e122d80cc7d52bc05d5dabcae90824b5b74c408461fb176f23202e994
font_01_sfnt_off0000f478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF478 11224 bytes
SHA-256: a43642246eb77b9ee2fa4d19d88e1388e73220cab4fe7fe01a7432dbc0b6404e
font_02_sfnt_off00011a7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A7D 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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