Malicious PDF — malware analysis report

Static analysis result for SHA-256 47da725c3ef6e405…

MALICIOUS

PDF

77.3 KB Created: 2021-02-27 05:39:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 186b92a021d5e899df3ebd3b0c4d861d SHA-1: 4223e92a2d868d6857dadcca21567f6c060ed6bc SHA-256: 47da725c3ef6e4053a2c04b7a30b304324960d0416f20ee8106a17ac79f131ba
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are associated with link farms, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text related to 'Farming simulator 15 free download', indicating a lure for potentially unwanted software. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/123?utm_term=farming+simulator+15+free+download+for+windows+10 PDF link annotation
    • https://lurekoba.weebly.com/uploads/1/3/4/0/134018443/1750988.pdfIn PDF document text
    • http://joxexezukefu.22web.org/nokajazu.pdfIn PDF document text
    • https://cdn.sqhk.co/kavatupopum/b0kvhiN/download_game_restaurant_story_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/dhhkjia/katafewutufijoro.pdfIn PDF document text
    • http://comforfemj.fun/upgrading_and_repairing_pcs_21st_editionwq1j7.pdfIn PDF document text
    • http://tufofol.medianewsonline.com/rusixipeseloz.pdfIn PDF document text
    • https://tivufotevomok.weebly.com/uploads/1/3/2/6/132682035/9938893aadc65.pdfIn PDF document text
    • http://ezfix.asia/dubakesuralenajixukuzinigmth2.pdfIn PDF document text
    • http://votixibutiro.medianewsonline.com/april_2020_romance_books.pdfIn PDF document text
    • http://mists.space/android_screenshot_settingsxw9ky.pdfIn PDF document text
    • https://cdn.sqhk.co/mugolino/TlAhcqr/ugandan_knuckles_vrchat_original.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wowupopokidejol.rf.gd/dometic_air_conditioner_parts.pdfIn PDF document text
    • http://jufomotapi.epizy.com/guziju.pdfIn PDF document text
    • http://runijekadenad.epizy.com/how_to_update_my_golf_buddy_voice.pdfIn PDF document text
    • http://fojakosi.atwebpages.com/linux_for_beginners_jason_cannon.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/naruto_shippuden_senki_latest_version_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/business_plan_template_for_doctors.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/biologie_marine_formation.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/19567322680.pdfIn PDF document text
    • http://resilasijajatil.myartsonline.com/how_to_rig_a_live_bait_for_bass.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_off0000eff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF7 5592 bytes
SHA-256: ab2714c0a93fcf6231f1a4b9e7a1fc8a2068823d66652f83bc60698b4f7a05ab
font_01_sfnt_off00010305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10305 10980 bytes
SHA-256: f14a5719f72d692e25a2cd85605089c1c7a269388f33ab843bd44d268ed92e67

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