Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f642e6bfd6889c1…

MALICIOUS

PDF

105.8 KB Created: 2021-02-22 07:48:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0874d2bfef7a10a50e8f1f2c66b67de4 SHA-1: fdfa0030d18b40ac657ac8efa045783be2528aff SHA-256: 7f642e6bfd6889c1f1e3c10e77870a93a454600cea75fe8ee8e21bebae8634c7
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, many of which point to disposable domains and are structured as link farms, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a lure to a malicious site.

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://bologen.ru/strik?utm_term=how+do+you+fix+a+chromebook+screen PDF link annotation
    • http://mmmuuuue.space/lajiminogojevuregifunol44abn.pdfIn PDF document text
    • http://pressit.space/jaipur_tourism_guidel99zi.pdfIn PDF document text
    • http://kosufezegaxid.iblogger.org/83451224052.pdfIn PDF document text
    • http://judijemavup.22web.org/parquet_file_format_wiki.pdfIn PDF document text
    • http://amin-ukraine.net/pedaxavisugasi2zq7.pdfIn PDF document text
    • http://witotikumuw.22web.org/kitchenaid_superba_42_water_filter_location.pdfIn PDF document text
    • http://kawlites.online/motumelitifinifodetegoz9bff1.pdfIn PDF document text
    • http://jadebey-x.com/658996998945b2um.pdfIn PDF document text
    • http://lolkek.xyz/20697584140tqq74.pdfIn PDF document text
    • http://meziradidanaru.iblogger.org/muv_full_form_in_cars.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://logedulon.epizy.com/61762032462.pdfIn PDF document text
    • http://tewejifofobaj.rf.gd/hobart_meat_slicer_price.pdfIn PDF document text
    • http://marilineme.epizy.com/99851177472.pdfIn PDF document text
    • http://gevitejivojo.rf.gd/24949039728.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_off000160cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160CD 5656 bytes
SHA-256: 72a66a0fdf0345e5c0d233fa9b1821714257a574240689d1664d92ac9b20cfe5
font_01_sfnt_off000173f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173F2 11136 bytes
SHA-256: ce7eebccdaea2fe3f6b61ba332052ec8f001e93caa48f7afece4e64144128298

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