Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9f2d97e27ac9fdb…

MALICIOUS

PDF

68.7 KB Created: 2021-09-26 08:01:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d7be81907b8c64a1d44278de23e662bc SHA-1: ac708f164638d7e2f8c38c8677accd0b2ec0e39f SHA-256: e9f2d97e27ac9fdba82cb58797bd3c8d71b0e708eb9292d9cbd57c3363d38ceb
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, suggesting a distribution or phishing campaign. The presence of external URIs and the 'link farm' heuristic strongly suggest the document's purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://catamma.ru/uplcv?utm_term=pdf+editor+exe+for+windows+10 PDF link annotation
    • https://lhorizon.ca/uploadHorizon/file/zakorofopola.pdfIn PDF document text
    • https://institut-arabe.org/ckfinder/userfiles/files/kidejonijitode.pdfIn PDF document text
    • http://perlawarmii.pl/userfiles/file/13402198318.pdfIn PDF document text
    • https://eghamatsafar.ir/basefile/eghamatsafar/files/81673630796.pdfIn PDF document text
    • http://www.parinet.fi/tiedostot/files/43593310418.pdfIn PDF document text
    • https://tavcam.com/upload/ckfinder/files/98515156189.pdfIn PDF document text
    • http://munnarteabungalows.com/userfiles/file/witabewufipakemi.pdfIn PDF document text
    • http://gro-felix.si/uploads/jeribebonos.pdfIn PDF document text
    • http://shopcloud.cloud/ckfinder/userfiles/files/73187339996.pdfIn PDF document text
    • http://rent2day.ca/ci2/userfiles/files/wojeriwogufaxozivajewifa.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/38adrosen0uf38otk8p3ojpmq9/bogibufadofabebisavi.pdfIn PDF document text
    • http://kunbot.com/upload/files/sezeguvunajifevito.pdfIn PDF document text
    • https://sistemagestiondpr.com/userfiles/file/97556312034.pdfIn PDF document text
    • https://speakingparrot.com/upload/ckfinder/files/11386651666.pdfIn PDF document text
    • http://solarexperte.ch/fckeditor/editor/images/file/42161825067.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/b4794120b119f07afecbbf06763209f6/levezebif.pdfIn PDF document text
    • http://autoservizimensi.it/images/fck/file/55965502743.pdfIn PDF document text
    • http://aviafond.ru/userfiles/file/80651094941.pdfIn PDF document text
    • https://rjpexport.com/files/87186001230.pdfIn PDF document text
    • http://puntolinea.org/userfiles/files/14298838123.pdfIn PDF document text
    • https://aluvioneschicamocha.sinecsas.com/ckfinder/userfiles/files/37564874645.pdfIn PDF document text
    • http://mauchlineware.com/html/chapelstreet/web/userfiles/files/nilotuzomuferuloxopewon.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://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_off0000ae93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE93 14560 bytes
SHA-256: 55845c73fe9ce06e7642748cccd5ea4087ed19f7808013d99b1dba9dd500d1f2
font_01_sfnt_off0000d321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD321 10504 bytes
SHA-256: 95693eb44352117bd086c575d267a77ec9c37dc63af95fe8483603ee1b8a0002
font_02_sfnt_off0000eb44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB44 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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