Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8372b8f58c70b73…

MALICIOUS

PDF

74.1 KB Created: 2021-02-19 05:39:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: faa8d2c75b92c1a397e6cab71f859c7e SHA-1: 490833c94ccbb24535de615be05172a809273ba8 SHA-256: d8372b8f58c70b731d00d306108b7e0fc790da35303dbf0b28cd76b1bff1ee30
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many pointing to disposable hosting services, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

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://jottigo.ru/123?utm_term=how+to+assemble+a+toy+windmill PDF link annotation
    • https://riwusivi.weebly.com/uploads/1/3/4/9/134900433/7421875.pdfIn PDF document text
    • https://bebibamo.weebly.com/uploads/1/3/1/4/131438385/03601d1478bbd8.pdfIn PDF document text
    • https://cdn.sqhk.co/suzeboxiwo/iPhfdLu/dunk_shot_basketball_game.pdfIn PDF document text
    • http://golesaluwo.66ghz.com/5531323186.pdfIn PDF document text
    • https://safasisi.weebly.com/uploads/1/3/4/4/134472516/wipokezudedezobune.pdfIn PDF document text
    • https://xisuviwilizej.weebly.com/uploads/1/3/4/3/134320176/teweri.pdfIn PDF document text
    • https://nubiduxabegi.weebly.com/uploads/1/3/1/8/131871606/4373182.pdfIn PDF document text
    • https://guwuviwanawa.weebly.com/uploads/1/3/2/6/132695801/wetolejejijikug-wajazepoj.pdfIn PDF document text
    • https://cdn.sqhk.co/pitadewedobu/ccjh4so/funny_parrot_talking_video_download.pdfIn PDF document text
    • http://nanewak.iblogger.org/kumovulen.pdfIn PDF document text
    • https://namonivet.weebly.com/uploads/1/3/4/4/134493383/9fabb2fb039798.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/35036331163.pdfIn PDF document text
    • http://lesefapor.epizy.com/85776847174.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/florida_residential_lease_agreement_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/erlking_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/amiduos_android_7.pdfIn PDF document text
    • http://zetesapoxus.epizy.com/augustine_confessions_henry_chadwick.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/endless_love_the_myth_piano_sheet_music.pdfIn PDF document text
    • http://renirujetumofid.epizy.com/gavoxekekuxesojo.pdfIn PDF document text
    • http://mejusamenubeto.rf.gd/navamadapezibekos.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE452 5172 bytes
SHA-256: 19acede5d0d159bb0268d2c4f4550baf4b214941766373b6e668a3f3e4f6f05f
font_01_sfnt_off0000f5e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E7 10884 bytes
SHA-256: d7886d648c1ebfc8b31865e28d8bdecccfbb02192279492fdbef45548fb8fcb0

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