Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eb59b44a43f34d2…

MALICIOUS

PDF

67.4 KB Created: 2021-10-02 17:25:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a9be69300c5af886656fc43a68fb01f4 SHA-1: d8dcc9cd03b62901e343026559d9a8e90eda527e SHA-256: 7eb59b44a43f34d2a939f2129ad1fb78ae4b344161ac019f4f57a8ca874e09e9
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-based lure, typical of phishing campaigns, designed to trick users into clicking malicious links. The presence of numerous external URIs, including one with a 'download game' UTM term, suggests an attempt to redirect users to potentially malicious content or downloads. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 67 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://philabc.ru/uplcv?utm_term=download+game+five+nights+at+freddy%27s+4 PDF link annotation
    • http://cuacuonnhaxuongbinhduong.com/upload/files/1429875980.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/rosidavijemibudoxiku.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/06134ccc7ceec8c547c537287cb8b444/60978368897.pdfIn PDF document text
    • https://appchecar.com/ckfinder/userfiles/files/39765499085.pdfIn PDF document text
    • http://pharmorgsyn.com/upload/files/zosalexalabafe.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/5341262288.pdfIn PDF document text
    • https://illustrations.noche.fr/images/files/tewomo.pdfIn PDF document text
    • https://svezadjecu.me/userfiles/file/64877053311.pdfIn PDF document text
    • https://bdprescription.com/ci/userfiles/files/nuxeno.pdfIn PDF document text
    • https://nutritie-metabolism-sanatate.ro/app/webroot/files/userfiles/files/wivugonepazogofozo.pdfIn PDF document text
    • http://efrex.cz/files/file/fowidof.pdfIn PDF document text
    • http://studiogallerani.it/userfiles/files/13511419171.pdfIn PDF document text
    • https://www.gryf-wet.pl/ckfinder/userfiles/files/rutexedexavoweperudumu.pdfIn PDF document text
    • https://carcable-bg.com/uploads/pictures/files/93854127533.pdfIn PDF document text
    • https://pratham.one/file/84310279083.pdfIn PDF document text
    • http://xn--80aer5aza.xn--19-kmcm3c.xn--p1ai/ckfinder/userfiles/files/24474908105.pdfIn PDF document text
    • http://honderhotel.com/UploadFiles/FCKeditor/20210904144755.pdfIn PDF document text
    • http://canvangdientu.com/images/file/fakisenifujo.pdfIn PDF document text
    • https://5703n1n6999-6a55.com/contents/files/46296240995.pdfIn PDF document text
    • https://resttour.com/images/userfiles/files/49841828006.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_off0000aaa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAA6 14280 bytes
SHA-256: 9826789f82396f96a5bc1aaff5787adc3c7385f4174a1c1553baffe5abd2b46b
font_01_sfnt_off0000ce6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE6D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE684 11180 bytes
SHA-256: d63a8d6aa59639d6a6f2e696124b69a6ab12e9954788a488c72d168075e013d8

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