Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaf4aaf3dd427746…

MALICIOUS

PDF

84.0 KB Created: 2021-03-09 01:50:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 5e0c00fb4442aa78a83cbfa04109493a SHA-1: beae66749f88723a5901e45a6d0ddb25cf606b71 SHA-256: aaf4aaf3dd4277467e3746d3ebc4262a6bc2be3cacb9b54e8bb461836ab2ff6f
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, likely intended to drive traffic to various websites. The ML classifier and ClamAV detection strongly indicate malicious intent, with the PDF being flagged as phishing and a trojan. The embedded URLs suggest a spearphishing attachment vector, aiming to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/wix?keyword=masterbuilt+xxl+turkey+fryer+manual PDF link annotation
    • https://bezofaxifi.weebly.com/uploads/1/3/1/6/131606652/2354668.pdfIn PDF document text
    • https://rusuxizebagujam.weebly.com/uploads/1/3/5/3/135302265/zisukerizek.pdfIn PDF document text
    • https://rezolokad.weebly.com/uploads/1/3/4/7/134718373/bf8aa0ef58b6b.pdfIn PDF document text
    • https://ragojozuzaz.weebly.com/uploads/1/3/4/6/134668900/0c8383.pdfIn PDF document text
    • http://housefashion.ru/308823643297s4t1.pdfIn PDF document text
    • http://gepanukotex.getenjoyment.net/29618604284.pdfIn PDF document text
    • http://prodson.space/strangers_on_a_train_book_vs_movie4gddd.pdfIn PDF document text
    • http://gesetaxoxu.sportsontheweb.net/what_is_the_point_of_amusement_park.pdfIn PDF document text
    • http://kaboliwup.mypressonline.com/rufaxijikiverazemi.pdfIn PDF document text
    • https://cdn.sqhk.co/xesagomi/a3WRnEm/22346451830.pdfIn PDF document text
    • https://cdn.sqhk.co/milatepoz/CZ9sheR/nipidopunuti.pdfIn PDF document text
    • https://noxerurivago.weebly.com/uploads/1/3/4/7/134767941/vavemajumexov-tipuveluf-vadukepij-tebotobe.pdfIn PDF document text
    • https://jedegifopa.weebly.com/uploads/1/3/0/7/130738854/131ef8c5d7ad.pdfIn PDF document text
    • http://mokaxizekebade.scienceontheweb.net/66423633745.pdfIn PDF document text
    • http://uscreditinquiry.info/58528437624tqfbp.pdfIn PDF document text
    • http://wivaserana.mywebcommunity.org/numadulosinis.pdfIn PDF document text
    • http://copyrightreports.com/isometric_paper_template_a42x1qy.pdfIn PDF document text
    • http://vugekowuzujed.scienceontheweb.net/80221985479.pdfIn PDF document text
    • https://pabotori.weebly.com/uploads/1/3/1/0/131070723/1191118.pdfIn PDF document text
    • https://zifimegepero.weebly.com/uploads/1/3/4/6/134601706/2b5f7b6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://saxodanokijaj.atwebpages.com/32356422663.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_off00010cd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD7 5292 bytes
SHA-256: 0b69f01a53476195c01e4c691599958eece54b29ceaeb8806a6a2ea43be14bc0
font_01_sfnt_off00011eda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EDA 10516 bytes
SHA-256: 294e8144e17e2b609737e0a4899eebf43f485996319ae8fe8efe318b5bf27f78

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