Malicious PDF — malware analysis report

Static analysis result for SHA-256 b46ffebcf7240994…

MALICIOUS

PDF

74.1 KB Created: 2021-03-18 10:14:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 879884f2456110cffe3ec5e57a5b8eee SHA-1: 5a199b74f8ef2252db72f6ca26693eee3526813a SHA-256: b46ffebcf7240994bee6abf16fb16ba87964ee1fc9deb93d46663b432f2f5da2
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 0.9998

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://seumenha.ru/123?utm_term=musica+capoeira+paranaue PDF link annotation
    • https://nosuzodudoj.weebly.com/uploads/1/3/4/5/134588086/mubazonujudi-jekixusaw-vijezesego-suxavov.pdfIn PDF document text
    • https://feloxoxux.weebly.com/uploads/1/3/4/0/134000485/bokoxiguliraxabuj.pdfIn PDF document text
    • https://xukusoresi.weebly.com/uploads/1/3/4/4/134488105/tiripo-wemidakafin-lijapifagof-sozomebudatoxi.pdfIn PDF document text
    • https://kobadoxe.weebly.com/uploads/1/3/4/3/134310171/fezonogowisa.pdfIn PDF document text
    • https://sevebara.weebly.com/uploads/1/3/4/5/134501605/mowovudujilija_rivapunenudewi_devujino_wesewomokipen.pdfIn PDF document text
    • https://xetupowo.weebly.com/uploads/1/3/1/3/131382232/3189092.pdfIn PDF document text
    • http://rexonina.medianewsonline.com/tadabbur_al_quran_free_download.pdfIn PDF document text
    • https://dasujodiket.weebly.com/uploads/1/3/4/4/134481559/zavuzek.pdfIn PDF document text
    • https://fimedezederuru.weebly.com/uploads/1/3/4/8/134884956/namod.pdfIn PDF document text
    • http://tubesebove.medianewsonline.com/32691677550.pdfIn PDF document text
    • http://wipunemobak.mygamesonline.org/gepiverogubobadexike.pdfIn PDF document text
    • https://lerugusenexeke.weebly.com/uploads/1/3/5/3/135317851/waliwatugetaxipiviv.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
    • https://uploads.strikinglycdn.com/files/bfde201c-d2c1-4dab-a8af-96d9ccde0776/radogarisixevupilewali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/577c3292-cd43-4773-a707-d34f909adaed/wajeporabidaxelejob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/423b58c5-ee94-447b-ac02-ece932edd285/86483730811.pdfIn PDF document text
    • http://gapoxuvopa.onlinewebshop.net/40570386932.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35bad56f-e3c3-4070-93f2-3624d396af19/fewix.pdfIn PDF document text
    • http://zitulogakapede.myartsonline.com/best_version_of_as_a_man_thinketh.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d44e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD44E 4700 bytes
SHA-256: 5720f341667e778f0ab72353f7db837645e187fc2cbf4f7f161a739fce38b74a
font_01_sfnt_off0000e44d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44D 12940 bytes
SHA-256: 13dceb21ecdff5c438af3a1f9076252b9b791aab1cb4610771b31698bf2f2c5a
font_02_sfnt_off00010bc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC3 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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