Malicious PDF — malware analysis report

Static analysis result for SHA-256 97e8b37a4168cfab…

MALICIOUS

PDF

81.0 KB Created: 2021-02-25 15:49:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 9dc967fba6a7325c14848aacdfbc646c SHA-1: 8dff088ca34a8d66351ce0e0b08368479a98e0ec SHA-256: 97e8b37a4168cfab573439c9b37e5b16ac225a55da0e52745675d80a3883b089
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a malicious redirection to external sites.

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://druttle.ru/strik?utm_term=football+training+exercises+for+5+year+olds PDF link annotation
    • https://gojufepegaxop.weebly.com/uploads/1/3/4/3/134339744/fadananelagita.pdfIn PDF document text
    • https://raxuzorozejataw.weebly.com/uploads/1/3/4/0/134042373/tituriru-zemopupijazef.pdfIn PDF document text
    • https://zosafetudosejo.weebly.com/uploads/1/3/4/6/134670517/e33c8.pdfIn PDF document text
    • https://newafiramolik.weebly.com/uploads/1/3/1/0/131070062/b437942.pdfIn PDF document text
    • https://cdn.sqhk.co/togodawexu/SZzgehf/fire_and_water_restoration_contractors_insurance.pdfIn PDF document text
    • https://cdn.sqhk.co/zogowefu/aahfFiO/magic_jigsaw_puzzles_not_working_in_windows_10.pdfIn PDF document text
    • http://difavusimope.iblogger.org/kijedisajokazototumegun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gadunekubajip.rf.gd/andromeda_substratum_twenty_eighth_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/butterflies_episode_1_mod_apk.pdfIn PDF document text
    • http://kuxomexepus.epizy.com/30835704340.pdfIn PDF document text
    • http://bidetorula.rf.gd/para_que_sirve_el_acido_clorhidrico_en_el_estomago.pdfIn PDF document text
    • http://zapudeni.epizy.com/fitivezadesewovukiwugotu.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_off0000ffd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD6 5580 bytes
SHA-256: de5b6ee85016ce3f9e411c8393a9fd51a1414a94878537caca5d54509944460c
font_01_sfnt_off000112f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F0 10604 bytes
SHA-256: cd64c35118817c41fe16b6c37b43e4dca3265d73117448451aaeee0021e129ca

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