Malicious PDF — malware analysis report

Static analysis result for SHA-256 c57a326ff278c408…

MALICIOUS

PDF

75.8 KB Created: 2021-02-19 03:20:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: b6ca8f20df7d6e2d1c8b77bc98962506 SHA-1: f22ab60b2f2be3016a261290769a8d1bf9b7ce5f SHA-256: c57a326ff278c4080e0230dcd0a4c1dd3e1b1b8f14b66bb3a0dcce8fafc0da24
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains numerous embedded URLs, many hosted on disposable domains or link farms, suggesting a phishing or redirection scheme. The PDF's structure and embedded content, including the use of 'utm_term' in a URL, strongly suggest it's designed to trick users into visiting malicious sites by appearing as a relevant search result.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • 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/123?utm_term=how+to+change+region+on+samsung+smart+tv+7+series PDF link annotation
    • https://jurefuzosapob.weebly.com/uploads/1/3/4/9/134901670/zedarato.pdfIn PDF document text
    • https://cdn.sqhk.co/wapogade/jiHKici/ghetto_cartoon_wallpaper_download.pdfIn PDF document text
    • https://vesanalu.weebly.com/uploads/1/3/1/4/131482823/7091674.pdfIn PDF document text
    • http://ferobuxanax.iblogger.org/6th_grade_math_textbook_answers.pdfIn PDF document text
    • https://kepefiporewe.weebly.com/uploads/1/3/4/7/134704647/3673468.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415534/normal_5fdedd316ba91.pdfIn PDF document text
    • https://tepogixe.weebly.com/uploads/1/3/1/4/131437844/5907591.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421200/normal_60246bcfa87b6.pdfIn PDF document text
    • https://cdn.sqhk.co/todusukiraxi/hjheche/lawiwuxubiro.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474746/normal_5ff9557acab36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368225/normal_6024753a1b2ff.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/ijT1m7l/shadow_fight_2_weapon_hack_ios.pdfIn PDF document text
    • http://nivakagudan.22web.org/clash_of_clans_cheat_app_free.pdfIn PDF document text
    • https://voxepobar.weebly.com/uploads/1/3/4/6/134668427/5977709.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415055/normal_5ffa9b100603c.pdfIn PDF document text
    • https://vovinusowoxojik.weebly.com/uploads/1/3/4/3/134349833/wedolaxevov.pdfIn PDF document text
    • https://cdn.sqhk.co/mapigusene/0iitSjc/classic_muscle_cars_for_sale_in_florida.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sibijexobesu.epizy.com/21600450898.pdfIn PDF document text
    • http://gogolozumer.epizy.com/kagozogatalozotu.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/mage_leveling_guide_ragnarok_revo_classic.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/bleach_vs_naruto_3._3_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/chuckie_egg_2.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_off0000e85b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85B 5376 bytes
SHA-256: 8eb9872a0a2456f0353b15f9de22fc1e0efbd6ca4f7d003f54d19af779f04462
font_01_sfnt_off0000fa9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9A 11348 bytes
SHA-256: 8ae266ef945d76b965e0e2e0a035b487645f72153139d53c8f055898378c8432

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