Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b4869b5969c7af9…

MALICIOUS

PDF

77.6 KB Created: 2021-03-08 18:42:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 0356f6089f594da62e61ef001e2bf355 SHA-1: 0a9d5c6ef5c6e5c1bd0574fd86708798716b2232 SHA-256: 3b4869b5969c7af939ec66e7c463e1c384baf0ba6783b6b2f3a7ec29727fc919
134 Risk Score

Malware Insights

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

The PDF document is flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It functions as a link farm, directing users to various external URLs, one of which is associated with a 'nuke mod minecraft 1.8.9' keyword, suggesting a lure for gamers. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest this PDF is designed for phishing or malware distribution.

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=nuke+mod+minecraft+1.8.9 PDF link annotation
    • https://zifofuxe.weebly.com/uploads/1/3/5/3/135386801/vakiwe_lawilukemoda.pdfIn PDF document text
    • https://cdn.sqhk.co/wagomito/tvAiggg/simple_checklist_app_iphone.pdfIn PDF document text
    • http://instapriz365.site/how_can_you_tell_if_a_gfci_is_badb8xsp.pdfIn PDF document text
    • https://cdn.sqhk.co/darojopul/jg9B2hb/57828183977.pdfIn PDF document text
    • https://vekewofamir.weebly.com/uploads/1/3/4/1/134131384/mixivof.pdfIn PDF document text
    • http://nerroba.info/antigone_jean_anouilh_francaistcker.pdfIn PDF document text
    • http://likelid.xyz/s_letter_beautiful_images_freely8hk.pdfIn PDF document text
    • http://reawolt.online/the_division_gear_guidegy4ex.pdfIn PDF document text
    • https://cdn.sqhk.co/gadapapar/ighD0ic/new_wallpaper_hd_pubg.pdfIn PDF document text
    • http://eeuuurrrrr.space/73275869197rfzy.pdfIn PDF document text
    • https://cdn.sqhk.co/funuwovo/ij860ld/dafowerimotulegari.pdfIn PDF document text
    • https://cdn.sqhk.co/fagiseregu/hf25Dhc/vosutadizekefokopikexelo.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/navoburarovada/jerizofafiduwefunob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aef3c319-fde0-4d46-801b-6b92b997ca44/lalifanonam.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/asha_guidelines_for_lateral_lisp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d12fb502-50c4-4ca0-a27f-5776f9ea624d/kofonipogobuzagegew.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD12 5424 bytes
SHA-256: f5b2bdf7e388d670574b1b3c87836c43c5675113a94f25cb15282c92bdf9197e
font_01_sfnt_off0000ef8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8B 10248 bytes
SHA-256: 7e416f6bc4505f27902b9038314f1388989f4c2a2c3bd7315d087ef5bf36e24b
font_02_sfnt_off000112d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D6 16120 bytes
SHA-256: 2a43102803a67b318205d5dea90b5c4bf0c2886ac692e5ba219cba4a29889123

Open this report in the interactive analyzer, or submit your own file for analysis.