Malicious PDF — malware analysis report

Static analysis result for SHA-256 51454224a806a7ee…

MALICIOUS

PDF

78.5 KB Created: 2021-02-27 10:31:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 5046de21b2060af77521bce15c5e92ac SHA-1: e569eaf0bf4d8f58e9d1b83604e0ae2d0cfaa600 SHA-256: 51454224a806a7eeaf58695ccbd6f9c92c4504c20c09a2ce194488e61f0ff23a
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting it's designed to redirect users to potentially harmful websites. The presence of embedded URLs further supports this attack pattern.

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://fokemale.ru/aws?utm_term=explorer+8300hd+remote+codes PDF link annotation
    • http://vorecan.fun/their_eyes_were_watching_god_love_quotes_with_page_numbers0le2n.pdfIn PDF document text
    • https://cdn.sqhk.co/lekusovu/ht4gdZG/85736895319.pdfIn PDF document text
    • https://feziriwavejoli.weebly.com/uploads/1/3/4/0/134096108/sizodoguz.pdfIn PDF document text
    • http://teenagetutor.online/xamarin_forms_ios_splash_screen_image64gqq.pdfIn PDF document text
    • https://mobuverafawez.weebly.com/uploads/1/3/5/3/135346795/rifisituj.pdfIn PDF document text
    • http://nowtorrentz.com/gps_phone_tracker_for_android_freeppj9v.pdfIn PDF document text
    • http://operationhomeplate.com/arcsoft_totalmedia_showbiz_3.5_manualjib6f.pdfIn PDF document text
    • https://vidokabotofasi.weebly.com/uploads/1/3/4/8/134868814/2604316.pdfIn PDF document text
    • http://1xbet-regi.site/vesuxesesunuraxapawozites5lbl.pdfIn PDF document text
    • http://meetly.space/how_to_make_a_glider_chair_cover1qs3i.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/gfhf0aw/46567364384.pdfIn PDF document text
    • http://shoop-fn.ru/kedovukadetijidux63y33.pdfIn PDF document text
    • https://cdn.sqhk.co/pumibavi/phbgfdL/pinkfong_puzzle_fun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF400 5628 bytes
SHA-256: dd739d199cb6114f801a0b3f95e89e8b7d443624c352f794b1f0a539b33279bf
font_01_sfnt_off00010701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10701 11272 bytes
SHA-256: ad0d7b6a40736fb190430a7679fdd964d188e315471e43680d48ca3db114fe3d

Open this report in the interactive analyzer, or submit your own file for analysis.