Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b039759b1f92167…

MALICIOUS

PDF

67.1 KB Created: 2021-02-05 23:02:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: b2e0d375fe616526998ad3900d7b02a5 SHA-1: 86a494400010259a1854c6ef4878469f1ad0b958 SHA-256: 8b039759b1f921674c9bfb795f8a90e1b5885491ca90169f7157938f8af9a639
164 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing lure and a link farm, with numerous external URLs pointing to potentially malicious content. The document body, though heavily obfuscated, appears to be a lure for a sprinkler timer manual, which is a common tactic to trick users into clicking malicious links. The ML classifier and ClamAV detection strongly indicate malicious intent.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://baarspo.ru/123?utm_term=orbit+easy+dial+programmable+4+zone+indoor+sprinkler+timer+manual PDF link annotation
    • https://nuvomananakoleg.weebly.com/uploads/1/3/1/4/131453817/sejawerubafekixofugu.pdfIn PDF document text
    • http://vonowaz.iblogger.org/plataforma_avales_centro_democratico.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/deihihM/97732020081.pdfIn PDF document text
    • https://cdn.sqhk.co/fefuxumito/gChayhf/kibekumukepitozugig.pdfIn PDF document text
    • https://cdn.sqhk.co/vaminika/bhhi3gO/blaze_and_the_monster_machines_clothing.pdfIn PDF document text
    • https://cdn.sqhk.co/zoturisa/qeMhhhd/talking_cat_video_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/dufukeraj/ic5LKH4/47656471821.pdfIn PDF document text
    • https://cdn.sqhk.co/wadusazilox/FgcjaV9/vamosumolawasipizadezi.pdfIn PDF document text
    • https://cdn.sqhk.co/pasivuzuke/gEODZOX/17033453127.pdfIn PDF document text
    • https://cdn.sqhk.co/remowiwa/eRjjHb9/zedge_app_play_store.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/poresi/layers_of_the_earth_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/bescom_online_payment_receipt.pdfIn PDF document text
    • http://sokagozu.rf.gd/adobe_animate_cc_character_templates.pdfIn PDF document text
    • http://bidanata.rf.gd/duloxurozevixotizifapax.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/anandam_malayalam_full_movie_free_hd.pdfIn PDF document text
    • http://movafomuwexowix.epizy.com/chromecast_not_showing_on_android.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/51986697744.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_off0000c963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC963 5748 bytes
SHA-256: 73dae33c919759272ec86f89bac77a7fc16b181a2b3a787782ca0adb0100c390
font_01_sfnt_off0000dcf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF0 9808 bytes
SHA-256: dc7da8b0fa5e70a3bab689f479901aebab82533197a090b984eee1618fe3537f

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