Malicious PDF — malware analysis report

Static analysis result for SHA-256 174829649f55218e…

MALICIOUS

PDF

81.5 KB Created: 2021-03-02 17:12:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 1c24024d7be8766633ee47732496d299 SHA-1: d837cbcc345937d5271694ffb4e24cd4cacdfa2f SHA-256: 174829649f55218e2e1b41ae3f15e6197b2b9d9a160f990853f62a6ee88b7eda
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant number pointing to disposable hosting and identified as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

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://resalured.ru/strik?utm_term=what+does+tempest PDF link annotation
    • https://titugujogimob.weebly.com/uploads/1/3/4/0/134017720/eb9013d1.pdfIn PDF document text
    • https://paxobafu.weebly.com/uploads/1/3/4/6/134697986/16fc6201793.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382643/normal_60372476f15e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443574/normal_5fd63d4d4935f.pdfIn PDF document text
    • https://vakikuxikedeti.weebly.com/uploads/1/3/5/3/135320305/9086798.pdfIn PDF document text
    • http://e-devletodeme.net/mudivozn12v.pdfIn PDF document text
    • http://tehnotop.store/facebook_app_install_free_mobileicb6m.pdfIn PDF document text
    • http://tdsevsvet.ru/fokedajojonixufelow7zej6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461777/normal_5fec6d8e2035f.pdfIn PDF document text
    • https://javekekowunafot.weebly.com/uploads/1/3/5/3/135324960/pasututuvubopuku.pdfIn PDF document text
    • http://momsmall.space/new_english_songs_2019_youtubes5km7.pdfIn PDF document text
    • http://inertbhjbj.ru/jerevirobidisdfpdk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478415/normal_603a8e6c63e00.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tefinavi.epizy.com/54849699283.pdfIn PDF document text
    • http://gixisenusadat.rf.gd/wake_me_up_avicii_live_performance.pdfIn PDF document text
    • http://futikuzita.onlinewebshop.net/what_is_the_primary_purpose_of_managerial_accounting.pdfIn PDF document text
    • http://mekavebij.epizy.com/19054291109.pdfIn PDF document text
    • http://pulutugorivexek.atwebpages.com/how_to_connect_logitech_wireless_mouse_to_receiver.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_off0000ff04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF04 5084 bytes
SHA-256: 4087c38a76f600cfd903894259026afd132b99795197f9f6e7a9b3b77418a092
font_01_sfnt_off00011038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11038 11660 bytes
SHA-256: 5416ff0e47c743756c46fe39e981939c5910ba5dbe74d6cfa91fefa0007006db

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