Malicious PDF — malware analysis report

Static analysis result for SHA-256 40150fc229e637d4…

MALICIOUS

PDF

80.9 KB Created: 2021-03-18 02:08:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7594d0ca30e5a2540df770e6ab27b259 SHA-1: 5b263c8bbc05e5ebf2e8e276feba310d4f2c8392 SHA-256: 40150fc229e637d4b74450aeec5e5d7a5f7f443d9b553d69d933e0e17242725b
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9996

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://zajinet.ru/wix?keyword=west+boylston+house+of+pizza+number PDF link annotation
    • https://cdn.sqhk.co/kagurase/dtjgjd7/mastermind_game_application.pdfIn PDF document text
    • https://cdn.sqhk.co/radageroboko/hih9hi2/backflip_stunt_video.pdfIn PDF document text
    • https://cdn.sqhk.co/xugosovemi/jfgdgcy/45496040303.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/jE0jhQW/70053447263.pdfIn PDF document text
    • https://zezogilak.weebly.com/uploads/1/3/0/8/130874046/buxul.pdfIn PDF document text
    • http://tipines.iblogger.org/pemagifesubeteneloju.pdfIn PDF document text
    • https://kopusinuzek.weebly.com/uploads/1/3/4/1/134131929/kikaxogugup-wanaja-famejomajaxiw.pdfIn PDF document text
    • http://berabufepibaj.iblogger.org/jadeboxikero.pdfIn PDF document text
    • http://pexiwaz.iblogger.org/71246971023.pdfIn PDF document text
    • https://sawifotu.weebly.com/uploads/1/3/4/5/134597463/kujawunujimibupema.pdfIn PDF document text
    • https://radalumimobexod.weebly.com/uploads/1/3/5/9/135957078/mosun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/32306fa3-3214-4d1f-bc7d-ba2e5e0445ee/juwekaboba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b5ab251-679d-49f6-ac37-76c909ce37ee/xubigivamapilegez.pdfIn PDF document text
    • https://s3.amazonaws.com/gatazeromij/runescape_fremennik_sagas_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/278be318-48bb-4d58-ae6e-3bb2ad0adf11/galifolasaru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f4978f5-1dbf-4595-9b7a-39a33299cd30/73211857423.pdfIn PDF document text
    • http://lawubipala.epizy.com/37887731629.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e66d292-18c1-492f-ab3f-14c11e437039/62217764929.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c1debba-f78e-495a-a2a5-6e1ee345f13d/valitemibegepemapuxu.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/library_automation_system.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/4353077861.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/96092659488.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_off0000fd2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2D 5444 bytes
SHA-256: 2aa2d5306252207658a87e286c0760051fd20c6918b30692f779ae621029f9a1
font_01_sfnt_off00010fa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA1 11304 bytes
SHA-256: 7aebfef6d369fb10ba82dd96a91839448def155bcb3eb2054c283e322fad946d

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