Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc5db4b88657985f…

MALICIOUS

PDF

76.0 KB Created: 2021-02-26 01:24:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 3f2daa7d80362dadac380034e61466b6 SHA-1: 9cbe1367e0bf6975b392f2280da3c8389d74ccfa SHA-256: cc5db4b88657985f08ba8864b3c47d2011b9857e86edf013e8f364ae9c0fdf1c
126 Risk Score

Malware Insights

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

The PDF contains numerous links to disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to exploit users by directing them to potentially harmful websites.

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://jacksth.ru/strik?utm_term=how+do+i+calculate+instantaneous+speed PDF link annotation
    • https://sokexuwog.weebly.com/uploads/1/3/4/3/134351495/b520339996fb2cd.pdfIn PDF document text
    • https://cdn.sqhk.co/baxijaxazixi/ihghVia/bivekiwusupom.pdfIn PDF document text
    • http://funseeds.site/lone_ranger_and_tonto_fistfight_in_heaven_sparknotes3skex.pdfIn PDF document text
    • http://gagivukamuw.getenjoyment.net/java_head_first_github.pdfIn PDF document text
    • http://return-0.com/wizim0chq3.pdfIn PDF document text
    • http://berabujadew.22web.org/ayushman_bharat_in_tamil.pdfIn PDF document text
    • http://subbellassecret.com/green_building_and_leed_core_concepts_guider3flm.pdfIn PDF document text
    • http://rcasino.info/321920207004jcxb.pdfIn PDF document text
    • http://zumigiguba.22web.org/solving_exponential_equations_and_inequalities_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/jumapevuz/aibiaai/word_crossy_answers_level_2834.pdfIn PDF document text
    • http://xevusezes.medianewsonline.com/wizard_spell_list_5e_rpgbot.pdfIn PDF document text
    • https://cdn.sqhk.co/bafesugoguwi/hbgfhbG/ironmaster_dumbbells_price.pdfIn PDF document text
    • http://wejuzofibab.medianewsonline.com/natobugonunawudumaposo.pdfIn PDF document text
    • https://naxibozagut.weebly.com/uploads/1/3/4/5/134580084/c4142fb7a682df5.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/hifghih/briefing_paper_template_australia.pdfIn PDF document text
    • https://poburazaz.weebly.com/uploads/1/3/5/9/135993358/1169315.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/davawina/todepawujajapi.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_off0000eb96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB96 5024 bytes
SHA-256: 313ab61a8f4750a0ad89b3d3a12f5c769e2cffcf0a15172b2ed958c5757352fa
font_01_sfnt_off0000fcce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCE 11068 bytes
SHA-256: 2beabfb5d349c2cb2fdb75fe6720a3473eb4292bb683184d6d681605f8ab0fd8

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