Malicious PDF — malware analysis report

Static analysis result for SHA-256 47c5dfc11f665cbc…

MALICIOUS

PDF

93.3 KB Created: 2021-05-30 19:21:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 005b197a6247cf93e971ea7a5d9fccb6 SHA-1: 892da1cdcae95bf5d28f30de6bfb05b2f4c65c8a SHA-256: 47c5dfc11f665cbca5211fb9b1b34e38f82baab728d616dff449a1b3e53f6398
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The primary URL, 'https://dugedepap.ru/strik?utm_term=how+to+reroll+honkai+impact+3', is likely intended to redirect users to malicious content or phishing pages. No scripts were extracted, but the PDF structure and numerous external links indicate a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dugedepap.ru/strik?utm_term=how+to+reroll+honkai+impact+3 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401545/normal_60249e6176576.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370078/normal_60015734c6104.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485434/normal_600a403e351d0.pdfIn PDF document text
    • https://fupefodomixeja.weebly.com/uploads/1/3/4/8/134889506/4192162.pdfIn PDF document text
    • https://xadijonoru.weebly.com/uploads/1/3/3/9/133997446/7019887.pdfIn PDF document text
    • https://xubebedi.weebly.com/uploads/1/3/0/7/130776367/2882095.pdfIn PDF document text
    • https://nuwoveforu.weebly.com/uploads/1/3/4/0/134099073/fiwulavuf_vumamudo_vilipaza.pdfIn PDF document text
    • https://nunubawuguxage.weebly.com/uploads/1/3/7/5/137504951/suketenidovefoxuteb.pdfIn PDF document text
    • https://paleforekirito.weebly.com/uploads/1/3/4/5/134579508/982765090d7726.pdfIn PDF document text
    • https://rulewosiziruzo.weebly.com/uploads/1/3/0/7/130739522/mekadesitu-baferubu.pdfIn PDF document text
    • https://xifamileg.weebly.com/uploads/1/3/4/6/134687686/xagiman_vafupomaxo.pdfIn PDF document text
    • https://lonopowixeza.weebly.com/uploads/1/3/4/6/134620564/zipomusupuxonuti.pdfIn PDF document text
    • https://ruparowix.weebly.com/uploads/1/3/4/3/134350000/8c1637b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407733/normal_6063ea210f41f.pdfIn PDF document text
    • https://kowedogade.weebly.com/uploads/1/3/4/8/134879104/40e45588.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405925/normal_60399e2ba10fd.pdfIn PDF document text
    • https://padotugaladod.weebly.com/uploads/1/3/4/6/134615244/2503216.pdfIn PDF document text
    • https://bupulaserora.weebly.com/uploads/1/3/1/4/131437689/7ef7abbcc.pdfIn PDF document text
    • https://vezuwuzasulibe.weebly.com/uploads/1/3/4/3/134354720/tupaxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422382/normal_6028d15d3438d.pdfIn PDF document text
    • https://xatosupitoso.weebly.com/uploads/1/3/4/0/134018334/3526989.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CE 2900 bytes
SHA-256: a28fcc4ba65d8171a55e8b87d646ac5d1dd213f66ab2b0026fd39e5ca5d32d1a
font_01_sfnt_off00010c10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C10 5276 bytes
SHA-256: 420c32edc9a80e9de5b7a6119d357b2367e71b540a700fc36abb1b39e1fb2aff
font_02_sfnt_off00011de4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE4 21544 bytes
SHA-256: 6e82917942f18b6a98d5e9882e1f413514104c924caf18cbf645ba0f1e9e798e
font_03_sfnt_off00015056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15056 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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