Malicious PDF — malware analysis report

Static analysis result for SHA-256 07555ec13dff417b…

MALICIOUS

PDF

74.1 KB Created: 2021-03-03 02:39:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b6f3076d9750d5c142e5eba127eb90ee SHA-1: a3e3d772ae884c47ee357673effdb2f2e20e5c76 SHA-256: 07555ec13dff417bfc5aedf804b8c6a4def1ba12118a369b83840d94d40a54f1
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farm characteristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=sas+ods+excel+wrap+text PDF link annotation
    • https://cdn.sqhk.co/wirowanorax/1HjhtIO/72054416580.pdfIn PDF document text
    • http://razvivatel.blog/kazibexujqn664.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/47739818707.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402507/normal_5ff8464b9d239.pdfIn PDF document text
    • https://cdn.sqhk.co/digatamale/9ADVhdA/28824602526.pdfIn PDF document text
    • http://jamotovoxut.mywebcommunity.org/sigma_bike_computer_with_cadence.pdfIn PDF document text
    • http://mignonette.space/89309189143vrcua.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvivemu/gphbha4/diroseson.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451744/normal_60383b0bc2cea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393635/normal_603370aa916da.pdfIn PDF document text
    • http://paxezimusosesa.scienceontheweb.net/bebikito.pdfIn PDF document text
    • http://topplafond.xyz/90002242353f3yvv.pdfIn PDF document text
    • https://vonepegoparopew.weebly.com/uploads/1/3/4/3/134352316/bee5a.pdfIn PDF document text
    • https://luwujapi.weebly.com/uploads/1/3/4/7/134751522/vupaxajalazuvo-fibutexelofimo-zifonidusus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476427/normal_60258f7a02315.pdfIn PDF document text
    • https://vifapuxup.weebly.com/uploads/1/3/4/0/134018045/1918178.pdfIn PDF document text
    • https://tujozidu.weebly.com/uploads/1/3/4/6/134694944/fidapefawuwudow-babeziputuwikot-jugimewox-piwenapademuvif.pdfIn PDF document text
    • http://matirimekege.22web.org/xukikakekogozotelo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dukodisedibuji.epizy.com/properties_of_exponents_with_fractions_worksheet.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
    • 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_off0000c395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC395 5328 bytes
SHA-256: fec769f25df9d12eeef2e5ffc284c3d8b4bc6b8c83b34cfb0cc43ed47e55cab8
font_01_sfnt_off0000d5cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5CF 1940 bytes
SHA-256: 414d786b459f0f5d2a731291ef1b870d88176140611ada2eab9f82aaf6e76e23
font_02_sfnt_off0000df05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF05 10736 bytes
SHA-256: 95cca43c7c5430f1e9a467e463310b589d56280ed5949daf05e1f33ca8975ad0
font_03_sfnt_off000103ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103EC 16160 bytes
SHA-256: b4d62efa195a2b4e000f8e677d07f67e36e8fcfc99319eaa5118aed7638d171a

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