Malicious PDF — malware analysis report

Static analysis result for SHA-256 89095e069daa598e…

MALICIOUS

PDF

86.4 KB Created: 2021-09-14 16:15:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 58a4ff48668b69e491fdb508c3007c41 SHA-1: f759c447e9df6fc17c458e8834918cc54a982a5f SHA-256: 89095e069daa598eaecb7d1020ffacb8a7595946e8fe7498fa3513d77ffa80d8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, likely as a first stage in a phishing or malware delivery chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • 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 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 http://ourpreferred.com/userfiles/files/27296108072.pdf In PDF document text
    • http://wawa757.com/uploads/files/21926040159.pdfIn PDF document text
    • http://avvocato-callegaro.it/public/file/77106829268.pdfIn PDF document text
    • http://atel-j.nl/uploads/files/punoxuwap.pdfIn PDF document text
    • http://www.ezmoving.com/file/13672511253.pdfIn PDF document text
    • https://indirimlipin.com/calisma2/files/uploads/37813758271.pdfIn PDF document text
    • http://diamant-x.sk/UserFiles/file/2808808372.pdfIn PDF document text
    • http://nceed.kr/pds/userfiles/files/48701363604.pdfIn PDF document text
    • http://jaqalsports.com/files/file/tugajikisode.pdfIn PDF document text
    • https://theurbanthinktank.com/files/28633538141.pdfIn PDF document text
    • http://koreanhotpot.com/uploads/files/miguj.pdfIn PDF document text
    • https://hojoairport.com/images/file/tuwujilix.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/a42d6d3050f2cdd722db05acc5399727/juwijipiwobigiv.pdfIn PDF document text
    • https://dmitrovka-zn.ru/admin/ckfinder/userfiles/files/fejij.pdfIn PDF document text
    • https://kapefashion.com/files/files/40440736948.pdfIn PDF document text
    • http://eortak.com/img/fck_temp/file/bodubugawikuwosowix.pdfIn PDF document text
    • https://unitedfightalliance.com/ckfinder/userfiles/files/94796555626.pdfIn PDF document text
    • http://vakoplus.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/mibavuluregolosarizewev.pdfIn PDF document text
    • http://skazka76.ru/pic/userfile/lurakasup.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/mejofin.pdfIn PDF document text
    • http://glina-master.ru/admin/ckfinder/userfiles/files/tumubibuj.pdfIn PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/59304791489.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135d74f24a03---93086644245.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=ilauncher+os+11PDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBB 18556 bytes
SHA-256: 5175fcf831280bcc5d45a937f20afa8206cda07b59b7214fc1256c6b7c531a6a
font_01_sfnt_off00011d3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D3A 10240 bytes
SHA-256: 5e0841145afd162040cd188316a297392ba705e31fa985477a8b48a4c2960fce
font_02_sfnt_off00013439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13439 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1