Malicious PDF — malware analysis report

Static analysis result for SHA-256 5446461cdfd2b4eb…

MALICIOUS

PDF

72.3 KB Created: 2021-02-25 15:04:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: fe7de544557a7d3f0ce9483e359aa59a SHA-1: 82c16f8908603542f0da6c5760414118e6e7afbf SHA-256: 5446461cdfd2b4eb43c69f85fcf873e89af9665cd4b4c7614e7acfc3d187b621
126 Risk Score

Malware Insights

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

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or malware distribution campaign. The presence of external URIs and the overall structure strongly suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=h20+x5+steam+mop+pads PDF link annotation
    • https://baputopozim.weebly.com/uploads/1/3/5/3/135336161/fufoxikinas.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobuwaxegu/cheLxgi/green_the_planet_2_best_weapon_fusion.pdfIn PDF document text
    • http://furniture21.online/soradalakigutn2x5z.pdfIn PDF document text
    • http://xekumaluvox.iblogger.org/bodger_and_badger_theme_tune.pdfIn PDF document text
    • https://wupupuredizuso.weebly.com/uploads/1/3/4/8/134894828/lelogefa_gonusimerasane_zinopukobakezuv_rurozema.pdfIn PDF document text
    • https://cdn.sqhk.co/risenulowo/UggShgn/kerala_rtc_mobile_app.pdfIn PDF document text
    • https://lanekuloriko.weebly.com/uploads/1/3/0/8/130874063/0ec76208029ce.pdfIn PDF document text
    • http://mazafaka69pussy.online/solidcam_5_axis_tutorialgz8wz.pdfIn PDF document text
    • https://cdn.sqhk.co/vujagefamig/2lFsnMI/fighting_spiders_philippines.pdfIn PDF document text
    • https://ledapenilodaro.weebly.com/uploads/1/3/1/0/131070651/bibidibozidage.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/wuwabobujasivor/ashampoo_burning_studio_8_key_free.pdfIn PDF document text
    • http://naremijex.epizy.com/chengtun_mining_group_annual_report.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_off0000de46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE46 5404 bytes
SHA-256: 9af4a0634054a01915bac3336dfbcf395cd82ecc520791452b628f750b08dffb
font_01_sfnt_off0000f09e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF09E 10452 bytes
SHA-256: ae27ff72d73b06aa696a36815416cd73306af2265c9cb80a3805bbe02e69004b

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