Malicious PDF — malware analysis report

Static analysis result for SHA-256 d05e5231400b9422…

MALICIOUS

PDF

74.4 KB Created: 2021-02-18 08:15:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7f4b882db870b3c8d5030682dfc79193 SHA-1: fa3a28a0040e7919317663a1b9c3be2fc9255467 SHA-256: d05e5231400b94225926ee419ac1bc263ca8a5f18a5e00163194f8723462a335
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically pointing to a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains a search query related to 'Spice and wolf manga end', suggesting a lure 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://seumenha.ru/123?utm_term=spice+and+wolf+manga+end PDF link annotation
    • http://fitness1.space/whatsapp_business_model_pptjpoi9.pdfIn PDF document text
    • http://mosdendy.store/68300367398oi30c.pdfIn PDF document text
    • http://nasporte1.fun/dirifuvelyotkk.pdfIn PDF document text
    • http://alkim.xyz/how_to_learn_english_online_free1htho.pdfIn PDF document text
    • http://ru-payment.casa/pozuvonawefafif6fdhv.pdfIn PDF document text
    • http://lifeit.pro/dadotfwnjm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sovizaz.epizy.com/purevpn_for_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/48378098358.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/metenopijazuvasufemovoket.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/army_records_information_management_system_training.pdfIn PDF document text
    • http://bixuxopot.epizy.com/79222355012.pdfIn PDF document text
    • http://zoregok.rf.gd/bafemavebu.pdfIn PDF document text
    • http://ximitexus.epizy.com/bootstrap_form_dropdown_style.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_off0000e825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE825 5396 bytes
SHA-256: c1651554b45e0b1cf94ed79a5e6fad5c42fbe8b61c21038985941a13fecc5f08
font_01_sfnt_off0000fa89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA89 9968 bytes
SHA-256: 3ad85c292f125f3832caaa94e835838a3930da2847168ebe9f3da282a4ffbb17

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