Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9fd4c0fb0b3e612…

MALICIOUS

PDF

74.9 KB Created: 2021-02-03 21:52:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 5bad1fd1070f5301eaf665961cfbfd48 SHA-1: 1cca800ad961cc5a8b5d9077defdafb817fe8ea7 SHA-256: b9fd4c0fb0b3e612feab1c10067c348987f1360553d21af630da36c6135d7367
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, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable domains or link farms, indicating a strong intent to redirect users to potentially harmful sites. The presence of 'utm_term' parameters suggests tracking or campaign-specific lures, common in phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/123?utm_term=persona+3+sunday+dates PDF link annotation
    • https://cdn.sqhk.co/xogatijixe/nienhgf/25681522249.pdfIn PDF document text
    • https://cdn.sqhk.co/tibakekavero/jPhc3gg/jelinafenifumop.pdfIn PDF document text
    • http://frukt.space/detedalag9ir0u.pdfIn PDF document text
    • https://cdn.sqhk.co/fudikuzi/nq5TjhQ/cafeland_world_kitchen_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/cjjOjaj/wobawikemizolug.pdfIn PDF document text
    • http://moreprodukti.com/xiwugubakoxadutikes9sy.pdfIn PDF document text
    • http://gedawuxofawu.iblogger.org/dogeketabaduziroke.pdfIn PDF document text
    • https://cdn.sqhk.co/tabakotodi/ZBjdDia/games_online_multiplayer_with_friends.pdfIn PDF document text
    • https://cdn.sqhk.co/satasevubu/ph4jaMr/38087937900.pdfIn PDF document text
    • https://cdn.sqhk.co/koluvukirate/ajjihQd/20677534896.pdfIn PDF document text
    • https://cdn.sqhk.co/mitugejaxel/4isKV5N/used_auto_parts_appleton_wi.pdfIn PDF document text
    • http://mikrotikwizard.com/ridokijolefijejotesorevawwgt4n.pdfIn PDF document text
    • http://ilkertr.shop/bass_booster_apk_androidjdocr.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/taturi/baseus_encok_s06_manual.pdfIn PDF document text
    • http://sokiguxesixup.epizy.com/hr_director_resume_template.pdfIn PDF document text
    • http://benobex.epizy.com/nozigikototofazuf.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/vovedekazazekonekibife.pdfIn PDF document text
    • http://mujusitajal.rf.gd/68928284364.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_off0000dbe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE8 3444 bytes
SHA-256: e35d95cea03bbe17f39eaf7e75d7cd7d6d3c4616d3db2b8dee0a9ab22dc8e819
font_01_sfnt_off0000e850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE850 5056 bytes
SHA-256: 2dd2c98dcd3362c1b0b85d0d36625e19a19366bc236f9041bd0605991dd7a7ab
font_02_sfnt_off0000f98f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98F 10716 bytes
SHA-256: ba69b56ff6720de58e80d4e95cd8a27ca96482a4842e48e06adbe7f6647c48f5

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