Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b1ad9d43a9ef840…

MALICIOUS

PDF

66.9 KB Created: 2021-03-25 16:08:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0264c7d107905b8e26325ab0c73303a6 SHA-1: 9364a16eea274358e4e5ff6a0c5003751c68a4c1 SHA-256: 9b1ad9d43a9ef84043e6a80baa82bfcf694b325ddeebe551d33b7030b6b151bc
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://ponafet.ru/123?utm_term=transformers+animated+prowl+x+jazz PDF link annotation
    • https://powagaminabori.weebly.com/uploads/1/3/0/9/130969211/kuliwuminofuz-jidowevofi-puxifajepipu-defapifedopoza.pdfIn PDF document text
    • https://cdn.sqhk.co/noxibogalu/fE7ggjb/funuwolunorajada.pdfIn PDF document text
    • https://wovovude.weebly.com/uploads/1/3/1/3/131397940/1184254.pdfIn PDF document text
    • http://fafabil.getenjoyment.net/wuvegiw.pdfIn PDF document text
    • https://kifofudodor.weebly.com/uploads/1/3/4/8/134878181/kipogexo.pdfIn PDF document text
    • https://cdn.sqhk.co/nufesewepi/h2j9jbU/pomada_bamitol_walmart.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387712/normal_60467a7ae3be6.pdfIn PDF document text
    • https://zunezazawegor.weebly.com/uploads/1/3/4/6/134665047/2284479.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379234/normal_5fc5ec3646ee2.pdfIn PDF document text
    • https://cdn.sqhk.co/devepogisog/iKohcLx/lefuvumit.pdfIn PDF document text
    • https://mepanomelisegil.weebly.com/uploads/1/3/4/8/134899905/9773925688f8.pdfIn PDF document text
    • http://keripudatoxene.iblogger.org/what_is_asatru_pagan_religion.pdfIn PDF document text
    • http://vabakavolageni.22web.org/84249015334.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xomapagovujux.atwebpages.com/data_analysis_example_in_research.pdfIn PDF document text
    • http://famereraba.epizy.com/torefopufelepenesuf.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_off0000c85c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC85C 5424 bytes
SHA-256: c7b7ed1696bbbdb81c31d810acb74cba1e696bb608f8960a3648c15ca3545efa
font_01_sfnt_off0000dad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD5 10516 bytes
SHA-256: 600c319c5de648eb7383c81691e7206d770a0975c75752ad757dd7162ef2514b

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