Malicious PDF — malware analysis report

Static analysis result for SHA-256 60852f843e05f616…

MALICIOUS

PDF

84.1 KB Created: 2021-09-19 05:04:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d65a4cecd36f1ed17a8690119788bfe5 SHA-1: a9317c8700bae1cbc63a31a756b50821dac7e167 SHA-256: 60852f843e05f616f07693aa461fb95cad71bebddafc03a7de599a3d10b44997
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, with one heuristic specifically identifying it as a link farm on disposable hosting, suggesting a phishing or malware distribution lure. While no scripts were explicitly extracted, the PDF structure and the presence of embedded URLs point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://biogenetixpharma.com/ci/userfiles/files/jogid.pdf In PDF document text
    • https://amadesafar.ir/basefile/amadesafarir/files/ragupopexivi.pdfIn PDF document text
    • http://www.xzass.org/ckfinder/userfiles/files/46689153631.pdfIn PDF document text
    • http://yds-wcv.jp/free_images/files/33448571215.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/4140820899.pdfIn PDF document text
    • https://samavetpharm.com/userfiles/files/bonazaze.pdfIn PDF document text
    • https://magnumattachments.com/ckfinder/userfiles/Files/sizekuletazozalomejuninu.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/toramedefokaj.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210905172411.pdfIn PDF document text
    • http://groupkaishan.com/d/files/wopetisibi.pdfIn PDF document text
    • http://szintai.hu/ckfinder/userfiles/files/pajilikadezawop.pdfIn PDF document text
    • http://novehorizonty.sk/userfiles/file/27314997649.pdfIn PDF document text
    • http://tsrmmessina.it/userfiles/files/bikalujaju.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/j7rsu98pept72bhd4nsj26lde4/tusovososovi.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145c7e28ba1c---44818889739.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/pojes.pdfIn PDF document text
    • https://maintogelonline2.com/contents/files/47450773329.pdfIn PDF document text
    • http://tuderprogettazione.it/userfiles/files/fovuboz.pdfIn PDF document text
    • http://lube-stc.com/ckfinder/userfiles/files/85909795364.pdfIn PDF document text
    • http://85560891.com/upfolder/e/files/20210903205323.pdfIn PDF document text
    • https://raselapp.com/userfiles/file/tukul.pdfIn PDF document text
    • http://homokkepek.hu/editor_up/67266966383.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/xexim.pdfIn PDF document text
    • http://tuzy.pl/Upload/file/sizexabutitizugewiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=what+android+should+i+getPDF 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_off0000e689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE689 10620 bytes
SHA-256: e9f31a5aec5c7ee17c38a763b0bd9b2f62330a06b3b4f42bffc4958b062495f5
font_01_sfnt_off0000fe8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8C 17296 bytes
SHA-256: 1984035bd0489007195ab4ab578d0906a11134d3f4dd7c44f5ab090b388d5118
font_02_sfnt_off00012b32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1