Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5e6a392dd6efa1b…

MALICIOUS

PDF

71.7 KB Created: 2021-05-15 01:33:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 5ee780c662c03322169aaee1c656aca8 SHA-1: ad847a1ae5c83dc70578060bca0cf01cdd811acf SHA-256: f5e6a392dd6efa1b16ac2c084bcd933347712ab96626841e8a437aaa086f04c6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The presence of external URIs and the link farm heuristic point towards the T1566.001 (Spearphishing Attachment) technique, as the document likely serves as an attachment in a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://fokemale.ru/strik?utm_term=stihl+line+trimmer+accessories PDF link annotation
    • http://pop-marketplace.ru/sopizuzisokezun03us.pdfIn PDF document text
    • http://patajafurep.mywebcommunity.org/the_highwayman_cyberpunk.pdfIn PDF document text
    • http://5coupon.info/nuporevukedepisufoeh4.pdfIn PDF document text
    • http://help-copyrighteamservice.com/monsoon_safety_plan_for_construction_site_ppt1jmrs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451027/normal_6027dc9de364e.pdfIn PDF document text
    • http://heretythere.site/e_magazine_gujaratixychl.pdfIn PDF document text
    • http://waragofekoxexaz.sportsontheweb.net/homelessness_definition.pdfIn PDF document text
    • http://good-production16.site/60310783077050so.pdfIn PDF document text
    • http://videohost.space/escape_planet_earth_characters2zmax.pdfIn PDF document text
    • http://zunojuguk.22web.org/basic_biochemistry_books.pdfIn PDF document text
    • http://prizinsta365.website/original_african_heritage_study_bible_online3ug3l.pdfIn PDF document text
    • http://lowufadit.scienceontheweb.net/9786316191.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417644/normal_604b49ce7fcac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493553/normal_603f76a73f131.pdfIn PDF document text
    • http://tamodemuror.getenjoyment.net/90023864987.pdfIn PDF document text
    • http://kpovli.ru/affidavit_of_support_letter_from_friends_samplectxc1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387919/normal_5fcefcc7e5e82.pdfIn PDF document text
    • http://afracheat7.xyz/39085536676z2j61.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://seladetitogar.epizy.com/27338309976.pdfIn PDF document text
    • https://dd7ee03d-3646-4e01-a1e1-4c0a7e2c9e57.filesusr.com/ugd/d7ba0f_fa6137d85e7241cdb33478f79bc670a3.pdf?index=trueIn PDF document text
    • http://vilepobafomunow.atwebpages.com/verschillende_bestanden_samenvoegen_mac.pdfIn PDF document text
    • https://691dfa98-c543-4342-b77d-a3d7fbf094aa.filesusr.com/ugd/d55835_8f8deaa68a8d4d309fd6102958e7b40e.pdf?index=trueIn PDF document text
    • http://tetizawoto.rf.gd/8608220448.pdfIn PDF document text
    • https://e5eb5b25-b33c-43e3-82d5-57ab1bf863d8.filesusr.com/ugd/b0c717_0bed88849c4f4b47acee4c43eb7efaa5.pdf?index=trueIn 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_off0000db54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB54 5140 bytes
SHA-256: e3761f7757703947105aee25f386f166874125c902d1b865a059843b6c1e25b3
font_01_sfnt_off0000ec9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9C 10828 bytes
SHA-256: 5372fcf73239bbe2eb6226b4df7dbf8674b0007ae2357450df0812c8d7890417

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