Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ab982061f7af480…

MALICIOUS

PDF

67.3 KB Created: 2021-10-02 23:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: b2004ad2e5ebf8effd3e7452bb4300de SHA-1: 5bd8ec07bfb04c6f05397cdf4d2ab4bf4e6a8bf3 SHA-256: 0ab982061f7af480d60c95bb7630e71dce2fe728dd533b96980e845110174525
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to disposable hosting, consistent with phishing or link farm tactics. The PDF structure and embedded URIs suggest it is designed to redirect users to external sites, likely for malicious purposes such as credential theft or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • 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.
  • 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://pistant.ru/uplcv?utm_term=the+satellite+of+the+earth+is PDF link annotation
    • https://infoenergie-loire.org/userfiles/file/xeranevonibutululenag.pdfIn PDF document text
    • http://circuitvietnamcambodge.com/hinhanh/file/buvepikubo.pdfIn PDF document text
    • https://vivekanandbawwa.com/userfiles/file/gekitifi.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/lebofedojivuzalimager.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/runarudizojuzasanisaji.pdfIn PDF document text
    • http://yuilchem.com/userData/board/file/85441339698.pdfIn PDF document text
    • https://sedefartphotography.com/resimler/files/digeduxumobima.pdfIn PDF document text
    • https://dp-engineers.com/admin/userfiles/file/58764220440.pdfIn PDF document text
    • https://iphone-odklep.si/vsebina/1270962808.pdfIn PDF document text
    • https://cargotavio.ru/files/file/detowirusojobuzojosu.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614b16ab5467e---51482366963.pdfIn PDF document text
    • https://australiancaravancentre.com.au/application/third_party/ckfinder/userfiles/files/sipabinaterovan.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd31c6f511---dagagoborofidakuwu.pdfIn PDF document text
    • https://krygina40.ru/UserFiles/File/5751469347.pdfIn PDF document text
    • http://webinaris.net/ckfinder/userfiles/publics/files/57331204331.pdfIn PDF document text
    • http://stilna-ya.com/_userfiles/file/roloxab.pdfIn PDF document text
    • https://stalbeckers.nl/userfiles/image/file/21785900968.pdfIn PDF document text
    • http://p-itos.net/admin/userfile/image/file/84563276768.pdfIn PDF document text
    • http://webs123.com/userfiles/file/55264339535.pdfIn PDF document text
    • https://robustbrakes.com/administrator/imagetemp/file/53598848487.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/1950495595.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_off0000ad56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD56 10168 bytes
SHA-256: 1d04b5f99d1070ddf30830d4fb329ae6338984fc1f1da922b6e8ee71965a6413
font_01_sfnt_off0000c43d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC43D 14308 bytes
SHA-256: 34592b4216820b50b176b4a6f89ff2b37725a643799283d0bb9ee1eb0e2c8d26
font_02_sfnt_off0000e831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE831 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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