Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d1f2a72c5fd6071…

MALICIOUS

PDF

68.8 KB Created: 2021-10-03 03:33:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: ab115fb5b328c44af2cc05fc556bf467 SHA-1: e2eb3909d2c24926361647ab904374d71eaa977d SHA-256: 1d1f2a72c5fd60719fb0063334f7d2bbd288eeb25587d6f16f3d711c21666842
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, typical for phishing campaigns, and contains numerous embedded URLs pointing to potentially malicious documents. The ClamAV detection and ML classifier strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 0 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 http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1615006e3613c9---38614403346.pdf In PDF document text
    • http://world-spa-resorts.com/dok/latasakusisadevivos.pdfIn PDF document text
    • https://alpinismbihor.ro/app/webroot/files/userfiles/files/nukujesixujigekak.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/f0474ca716b2d57ae3196133061743d2/61837394551.pdfIn PDF document text
    • http://circolosilverblufitnessclub.eu/userfiles/files/8943425620.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/komadewalexibujip.pdfIn PDF document text
    • http://riph.pl/userfiles/file/padaporojamijiwibibebe.pdfIn PDF document text
    • http://chandravanshi.com/userfiles/file/denajadejajezuzeji.pdfIn PDF document text
    • http://diplomat2014.ru/ckfinder/userfiles/files/75516671024.pdfIn PDF document text
    • http://avtokit116.ru/!upload/files/jakunuwonur.pdfIn PDF document text
    • http://balalajka.nu/media/40888423348.pdfIn PDF document text
    • https://agermag.ro/mm/file/gofedifemataziwejakuzo.pdfIn PDF document text
    • https://waxparadise.pl/userfiles/file/juwatowojivibebaxixugi.pdfIn PDF document text
    • http://mathrainbow.com/userfiles/file/64407940245.pdfIn PDF document text
    • http://seanbittinger.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vawiteza.pdfIn PDF document text
    • http://exosportsante.fr/ckfinder/userfiles/files/37847544366.pdfIn PDF document text
    • https://pianotuningdarwin.com/userfiles/files/97008768534.pdfIn PDF document text
    • http://bangkokmagnetwire.com/ecodev_test/image_system/files/nelegasasuzepumap.pdfIn PDF document text
    • http://bumsnab.ru/uploads/files/ripibosixon.pdfIn PDF document text
    • http://dioblina.eu/userfiles/file/61329140298.pdfIn PDF document text
    • http://mopron.ru/upload/files/43434955141.pdfIn PDF document text
    • http://drironcat.com/images/file/kozamipopibikosipobe.pdfIn PDF document text
    • https://manhremhoangvan.vn/wp-content/uploads/files/2187659934.pdfIn PDF document text
    • https://praktijk.zorglink.nl/ckfinder/userfiles/files/rojogexewoke.pdfIn PDF document text
    • http://riverhouse.at/pcms/content/file/23287633799.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=martini+is+made+ofPDF 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_off0000b2b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2B1 10464 bytes
SHA-256: ad64d892d18606bc11b2f1ff1b979b2a37265cf4cbf7bc88d804b2f18e5c669f
font_01_sfnt_off0000ca68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA68 14420 bytes
SHA-256: a5df8fe5e06d576d52530f0bc03392e8c7c87b5cc01a67fe8c1ca89ac6b12a97
font_02_sfnt_off0000ed76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1