Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f6970f7afd083f2…

MALICIOUS

PDF

73.0 KB Created: 2021-02-26 23:36:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 49d811831f26d5f804615268410007ce SHA-1: 6f7956cc844024080a1ff6b185f8c79917bf38f3 SHA-256: 2f6970f7afd083f280c23d3a6a14cf0f4fb15feb30592b693882c3ebc22f5e96
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The primary malicious URL identified is https://gimoguvi.ru/strik, which is presented with a search query related to fixing a Samsung water dispenser, serving as a lure.

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://gimoguvi.ru/strik?utm_term=how+to+fix+dripping+samsung+water+dispenser PDF link annotation
    • http://voseboler.iblogger.org/30174928549.pdfIn PDF document text
    • https://cdn.sqhk.co/bomemenun/Pgdtggk/zezozejoje.pdfIn PDF document text
    • https://wariraxaluxar.weebly.com/uploads/1/3/3/9/133986847/3616363.pdfIn PDF document text
    • http://koponegigat.medianewsonline.com/3672949921.pdfIn PDF document text
    • http://desokore.medianewsonline.com/30328413146.pdfIn PDF document text
    • https://zevamomarage.weebly.com/uploads/1/3/4/6/134611313/63bbfc33e224e.pdfIn PDF document text
    • http://madoxorijegobe.sportsontheweb.net/infinitely_repeated_games_exercises.pdfIn PDF document text
    • https://vetasokimatajed.weebly.com/uploads/1/3/5/2/135296406/giroxagulolapu-nizagadalixuxob.pdfIn PDF document text
    • https://buvewetaki.weebly.com/uploads/1/3/0/7/130775635/venutazujufebitosufa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pivimufe.atwebpages.com/jomilojowesofaxijiril.pdfIn PDF document text
    • http://jisijuvod.myartsonline.com/mental_status_examination_form_free_download.pdfIn PDF document text
    • http://nizowozutagele.atwebpages.com/gelukuxubazilizajobulolef.pdfIn PDF document text
    • http://maguvotu.rf.gd/49920657234.pdfIn PDF document text
    • http://deroselewem.epizy.com/fexeledojeja.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_off0000e39e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE39E 5452 bytes
SHA-256: adf7da1168745d9242bb7f1e5ed7ec62670542364ecf356d152e5e2c66d98a70
font_01_sfnt_off0000f62c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62C 9680 bytes
SHA-256: 3ed6fa73b6f08d03291e3727920d03d3ded165865d1c7a65a61e243f973876e2

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