Malicious PDF — malware analysis report

Static analysis result for SHA-256 7056de96d976434b…

MALICIOUS

PDF

96.3 KB Created: 2021-09-20 03:35:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 626f9b606dfd8dcaaab8875574adc379 SHA-1: 42469cf1ae5fecace67306df1d03b830d27ef6b3 SHA-256: 7056de96d976434b160373e757aa6a6dc158659bdd4b4218e34e8db5126e10f7
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, suggesting a link farm or phishing attempt. The presence of an embedded JavaScript stream further supports malicious activity, potentially used to redirect users or download additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9726

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://queure.ru/uplcv?utm_term=all+bangla+online+newspaper+list PDF link annotation
    • http://4reality.cz/userfiles/files/guzifovajukiboxunibat.pdfIn PDF document text
    • https://solucionaesp.com/ckfinder/userfiles/files/junivefu.pdfIn PDF document text
    • http://remproekt-m.ru/admin/ckfinder/userfiles/files/84139891114.pdfIn PDF document text
    • https://artgallery.devctn.com/ckfinder/userfiles/files/pibepizakufagidam.pdfIn PDF document text
    • https://kawanmto.info/contents/files/31483025465.pdfIn PDF document text
    • http://barbusci.it/maisUserFile/file/giwenini.pdfIn PDF document text
    • http://unite-chem.cn/upload/files/linijumerijixo.pdfIn PDF document text
    • http://to-kajihan.net/js/upload/files/65749711519.pdfIn PDF document text
    • https://dla-pracownika.pl/pliki_user/File/salufugexujiwomexulege.pdfIn PDF document text
    • http://praconsulgroup.ru/pict/file/49817341063.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/52622945825.pdfIn PDF document text
    • http://smarttechsolutionukltd.com/uploaded_files/userfiles/files/80384969749.pdfIn PDF document text
    • https://yar-net.ru/userfiles/file/sidosox.pdfIn PDF document text
    • http://pcserviszlin.cz/ckfinder/userfiles/files/32557898255.pdfIn PDF document text
    • http://www.tecnobor.com/ckfinder/userfiles/files/sivagenafubevogamubilu.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/kfln6eb32evk09v5fpu332h8vb/luzeg.pdfIn PDF document text
    • https://littleitalypizzany.com/nbloom/fckuploads/file/fugojifugotaminezategili.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1613acff686a89---46365579246.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/lovugufeveba.pdfIn PDF document text
    • http://ladispensadicampagna.it/uploads/assets/file/24622520323.pdfIn PDF document text
    • http://cudicio.it/images/file/98968393064.pdfIn PDF document text
    • https://ms01bet.com/contents/files/48776561205.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/55691736466.pdfIn PDF document text
    • http://tourbusan.net/FileData/ckfinder/files/20210910_021F3C7E6BCFEB68.pdfIn PDF document text
    • https://pastravariaizvoarelebratiei.ro/images/file/3814272522.pdfIn PDF document text
    • http://gocep.org/data/userfiles/files/14480658661.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB56 10636 bytes
SHA-256: ab1fbdc3bb1a26119cb3df71889fb9854726c677a01fad943bad15827dc67198
font_01_sfnt_off000103b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B0 16348 bytes
SHA-256: ddfd0f5701c8f6ac759d350870f9ffa86f9a733e7ab7738317b9a05592323bb7
font_02_sfnt_off00011a29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001323b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1323B 24540 bytes
SHA-256: f0041aa8d3b90c1636dbb3399c8e9c96e59d8c5b0bda1c3c4eb6c8a5cde50321