Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3f61f19159bd179…

MALICIOUS

PDF

79.6 KB Created: 2021-02-25 21:16:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 24c370f79764575db8297f98c53fa2c0 SHA-1: 829af82ee94e05673aa532d708c3682bb0e69f7a SHA-256: e3f61f19159bd179831b4f62ac510008a7d8a070638a3c3bf0cebc2b99169260
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a spearphishing attachment designed to redirect users to malicious sites.

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://druttle.ru/strik?utm_term=wdtv+live+plus+hd+media+player PDF link annotation
    • https://cdn.sqhk.co/damukowabij/hhOjdGY/ryan_fake_call_calling_video_ryan_s_chattanooga.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/FVifvG1/zuwalewoba.pdfIn PDF document text
    • https://cdn.sqhk.co/nozujeraguje/je2jcji/xonegefuzi.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/is_python_enough_for_machine_learning.pdfIn PDF document text
    • https://cdn.sqhk.co/dodanadofu/Qhaibv5/sniper_3d_gun_shooter_game_download_apkpure.pdfIn PDF document text
    • http://xufelaketodo.getenjoyment.net/sepejadujaki.pdfIn PDF document text
    • http://peromopativej.mypressonline.com/xekuli.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/6ja22he/pezuve.pdfIn PDF document text
    • http://mavigawika.scienceontheweb.net/wizosezipunamo.pdfIn PDF document text
    • http://guxubatawuze.iblogger.org/25217465641.pdfIn PDF document text
    • https://cdn.sqhk.co/nepodowu/che7hfT/flightaware_live_flight_tracking_app.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wevoxefi.epizy.com/guidepoint_pharmacy_crosby_mn.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/bosch_fridge_alarm_manual.pdfIn PDF document text
    • http://nifiloxoburufi.rf.gd/chutti_tv_cartoon_tamil.pdfIn PDF document text
    • http://daxajokawutuv.rf.gd/mivemibinujerokojoza.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_off0000f78e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF78E 5376 bytes
SHA-256: 3270dc18c2ea7695a4143a2ff49ae056d422e124fe6e547d2d206aac32c7d224
font_01_sfnt_off000109b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B8 11860 bytes
SHA-256: 010795984e8745f30c2525a02acd7ab18fa49809e08fe4eef933f670459ecd3b

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