Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d453c9dee704dc5…

MALICIOUS

PDF

68.6 KB Created: 2021-10-01 11:12:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 406794eb98d8774154d538bcddbbe144 SHA-1: 5822e17ccaa9eaa2f5ea9c07e386ae4426413b0a SHA-256: 1d453c9dee704dc5d8153bae2a45c05f4cef69ea23c84ceacfdb74e090b82959
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-only nature and embedded clickable actions. It contains numerous links to external PDF files hosted on various domains, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://filetorme.com/upload/files/90832043991.pdf In PDF document text
    • https://indiantalentjunction.com/milan/media/fagebujoramodobilujawo.pdfIn PDF document text
    • http://www.cavice.fi/tiedostot/files/6751669266.pdfIn PDF document text
    • http://helices-evra.com/userfiles/file/gavotefakajam.pdfIn PDF document text
    • http://home-plast.ru/foto/files/gimexof.pdfIn PDF document text
    • http://canxetaidientu.com/images/file/loxibezowisaneji.pdfIn PDF document text
    • http://abwcrainhwy.com/uploads/files/45489425785.pdfIn PDF document text
    • https://congnghiepxd204.vn/upload/files/71557299485.pdfIn PDF document text
    • https://cmf8.ir/data/file/21673506898.pdfIn PDF document text
    • https://alertsecurity.in/ckfinder/userfiles/files/55910285284.pdfIn PDF document text
    • http://kondicionery-fryazino.ru/upload_picture/file/96591828254.pdfIn PDF document text
    • https://penzion-pod-rozhlednou.cz/img/file/xuzobafuxibitadotojuna.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/56346565627.pdfIn PDF document text
    • http://nikkenj.com/userfiles/file/zazarejafikivosi.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16142e55c8d9b5---lodafilorofuz.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613b80880965e---62833030982.pdfIn PDF document text
    • https://mkontakt.com/dat/file/xojupevadaxolabagomuj.pdfIn PDF document text
    • http://formel1vermietung.de/userfiles/file/ludovexizijowuzi.pdfIn PDF document text
    • https://hotararicedo.ro/files/files/29026278503.pdfIn PDF document text
    • https://stephan-kratt.de/data/reiterhof/userfiles/file/lofapojesapaze.pdfIn PDF document text
    • http://brooss.by/userfiles/file/26857099925.pdfIn PDF document text
    • http://studiopedrazzini.eu/userfiles/files/31347301119.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=the+owl+house+season+2+episode+3+watch+online+freePDF 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_off0000ab82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB82 14736 bytes
SHA-256: dcd25ec023cb3e83ab094f825405197bc10fbd809fe3e59d0144c0d17f219d1a
font_01_sfnt_off0000d08b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD08B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e8a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A2 11156 bytes
SHA-256: 361c7ca8dadff1ee446ef11645661c22ea7c7db3102b7d4f6247bc789d527603

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