Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d77f33aafc59af7…

MALICIOUS

PDF

80.0 KB Created: 2021-09-13 08:11:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 2f8b7b9f35cb8d20661a4102de4d50a6 SHA-1: 74a4b9463a9a54afb6132f50761f568f1750d97f SHA-256: 2d77f33aafc59af731ee45c167c60462989ddbca6905b908f1588b48ca39fee8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to external websites, many of which are structured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with common phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://nomylo.ru/uplcv?utm_term=avatar+full+movie+in+telugu+download+movierulz PDF link annotation
    • http://irs-messtechnik.at/upload/30872921070.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/85838725350.pdfIn PDF document text
    • https://dalycity.com/wysiwygfiles/file/muvugemotukikes.pdfIn PDF document text
    • http://ornito-silesia.eu/userfiles/file/konuw.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/jusotojepapolup.pdfIn PDF document text
    • http://stowarzyszeniemalyksiaze.eu/img/upload/files/81583718006.pdfIn PDF document text
    • http://tataservice.it/userfiles/file/movuxagiwavazobo.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/lalol.pdfIn PDF document text
    • http://eg-connect.com/php_codes/Scott/VieauAssociates/code/userfiles/file/feselikebotisoparurev.pdfIn PDF document text
    • https://dom4m.by/userfiles/files/teweduvoxuzemo.pdfIn PDF document text
    • http://londonjip.com/userData/board/file/fokogukutebirewi.pdfIn PDF document text
    • http://jenan.com/ckfinder/userfiles/files/13514131977.pdfIn PDF document text
    • https://globalcareerclub.com/FCKeditor/userfiles/file/91647253809.pdfIn PDF document text
    • https://rosettes.it/userfiles/file/28059726570.pdfIn PDF document text
    • http://donkaew-furniture.com/ckfinder/userfiles/files/98405084654.pdfIn PDF document text
    • https://rougezenekar.hu/files/file/ruranusipenasidotaledu.pdfIn PDF document text
    • https://kme.pl/global/app/webroot/uploads/file/16304472994365.pdfIn PDF document text
    • http://hantechwelding.com/userfiles/file/2021090718044373499.pdfIn PDF document text
    • https://valubil.com/public/uploads/cms_file/cms_files/zemutidupexisibekolob.pdfIn PDF document text
    • https://crc.creativechange.net/ckfinder/userfiles/files/57042860810.pdfIn PDF document text
    • http://rideco.hu/upload/file/xivitutixirenivenajutu.pdfIn PDF document text
    • https://vmgeducationtrust.org/home/vmgedu/public_html/public/userfiles/file/lebazinifidiseka.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_off0000d482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD482 10820 bytes
SHA-256: 0887b877ad89ba5fb767a9416fd73c815cd396b7f2c1259715c3ad580c52411b
font_01_sfnt_off0000ed53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED53 17156 bytes
SHA-256: 1e09a3debdd4fc0ffa290e23c52250eb8a97bc59bf485fad0a1d747e7072025b
font_02_sfnt_off000119d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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