Malicious PDF — malware analysis report

Static analysis result for SHA-256 c84ae6212fe05ccf…

MALICIOUS

PDF

68.3 KB Created: 2021-03-02 20:57:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 79f4ac945f73c0cbb42b74217b0dc71a SHA-1: 4e01cd265e991951d1466d2ff7016eed10a18404 SHA-256: c84ae6212fe05ccfd2e48314bf767d1657f13d3d88e2b00c57191a4dbc67f912
186 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many pointing to disposable hosting, suggesting a link farm or redirection scheme. The primary URL mimics a search query for 'how to clean a dyson battery vacuum', a common lure for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and extensive link farm heuristic indicate malicious intent, likely to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wb?keyword=how%20to%20clean%20a%20dyson%20battery%20vacuum PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387709/normal_601049969183e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368975/normal_5fe184817b557.pdfIn PDF document text
    • http://xevusezes.medianewsonline.com/wizard_spell_list_5e_rpgbot.pdfIn PDF document text
    • http://powajaxib.medianewsonline.com/umrah_guide_booklet.pdfIn PDF document text
    • https://gotukedefiwukub.weebly.com/uploads/1/3/5/3/135309477/bifuxofaxikikowamuju.pdfIn PDF document text
    • https://vamububok.weebly.com/uploads/1/3/5/3/135317225/1593087.pdfIn PDF document text
    • https://cdn.sqhk.co/konumapedowe/dAzcjjc/sedix.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/arNZwjh/gironalubopepupotuso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365620/normal_601fafc921fff.pdfIn PDF document text
    • https://cdn.sqhk.co/gotulurowav/uhfgjih/26531436337.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455670/normal_5fe7c71f50982.pdfIn PDF document text
    • https://cdn.sqhk.co/wimakebibane/f7giDig/kekawasudixojuwetoforus.pdfIn PDF document text
    • https://mateboxabivof.weebly.com/uploads/1/3/4/7/134763458/9070843.pdfIn PDF document text
    • https://cdn.sqhk.co/kukisigafumi/dP1jchd/spelling_and_grammar_word.pdfIn PDF document text
    • http://kazimibi.getenjoyment.net/51036355109.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zitasixan.atwebpages.com/walegunimujive.pdfIn PDF document text
    • http://juxitogepamuwo.epizy.com/jofuvifamifuvutonov.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_off0000cde9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE9 5440 bytes
SHA-256: 9f7f9b96408001dbfd383e744a4151788e14c3e9e08eeeb628320b580f9ee572
font_01_sfnt_off0000e06c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06C 10460 bytes
SHA-256: 2487731a6b7b8392603813675a5f574d5353d8a346ca1a5f80cf06363110df3f

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