Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e6fadf0c9d16293…

MALICIOUS

PDF

71.9 KB Created: 2021-02-01 01:47:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: c7c48396bb41bbd856c4a681fafd8a05 SHA-1: 3dd122e5031fb4a362e9ab43fad79a15a190b6d9 SHA-256: 5e6fadf0c9d16293e30e853a4a7428763be36eb1abc0cf55cd18787e1c4a8bfd
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the ML classifier's high confidence score support the classification as a phishing or malware distribution lure.

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://jottigo.ru/123?utm_term=destiny+2+nodes+and+protocols+sleeper+nodes PDF link annotation
    • http://umniashka.ru/favunapb2fk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413004/normal_60115b05697f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379618/normal_5fce6163b3abb.pdfIn PDF document text
    • http://sunny-web.ru/32a_challan_form5oqyd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368760/normal_60160520647df.pdfIn PDF document text
    • http://activa-fb.com/boleyn_anna_knyv067b5.pdfIn PDF document text
    • http://4gusevshop.website/descargar_libro_don_seductordz806.pdfIn PDF document text
    • http://igcopyrightverify.com/partition_mistral_gagnant_piano_grat9kuqv.pdfIn PDF document text
    • http://cheapestshop.xyz/468914633196lr1b.pdfIn PDF document text
    • http://reduslim-sitoufficiale.site/transformar_foto_em_pngv7aw6.pdfIn PDF document text
    • http://13millions-warzone.store/richard_schmid_alla_prima_downloadeltar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418575/normal_5fd79f7b6551a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473651/normal_5fe54a1cd2595.pdfIn PDF document text
    • http://biomanix.best/adidas_neon_green_running_shoes0ma52.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413456/normal_5fc70d4a2f7bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489839/normal_5fd665f9bc941.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423460/normal_5fd389d2c3d84.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jenigaseze.epizy.com/silijuxibiju.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_off0000daf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF7 5300 bytes
SHA-256: c545c0073a8eb266a4ce3dfe9ebab6df4e9b2c7f161efc784f3f808905293f4f
font_01_sfnt_off0000ed1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1B 11136 bytes
SHA-256: 9604cfb506a658bc848248c8118c88ec82e4964e8f4a3422eef1ae833f1adc47

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