Malicious PDF — malware analysis report

Static analysis result for SHA-256 30353e8a9a5144ef…

MALICIOUS

PDF

68.3 KB Created: 2021-09-27 08:14:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 99499f597e29c6d534ede8193ed65eeb SHA-1: 7a2836e40fbd3ec7612f87c144764cc871584fb4 SHA-256: 30353e8a9a5144ef6def7a07904c2c603e59018e25bd7dd2a9ebbabba5766541
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many pointing to suspicious domains, and a heuristic identified it as a link farm on disposable hosting. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://kirakuramen.com/uploads/files/4405358537.pdf In PDF document text
    • http://tucsokszekszard.hu/images/news/file/karijatepopatoti.pdfIn PDF document text
    • http://quiltingacademy.info/fckeditor/userfiles/file/70592162200.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/81354151942.pdfIn PDF document text
    • http://xn----7sbicwad4afgcgd5aph7d5e.xn--p1ai/ckfinder/userfiles/files/64086030718.pdfIn PDF document text
    • https://malmospelmanslag.se/userfiles/file/zexozovimojugozawalivezul.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614fa94d66c65---mepalafe.pdfIn PDF document text
    • http://xn--80adic7alej3d.xn--p1ai/userfiles/file/92576601612.pdfIn PDF document text
    • http://perevodvnegiloifond.ru/pict/file/5389906751.pdfIn PDF document text
    • https://worldcastlive.com/userfiles/file/nolemipesitafi.pdfIn PDF document text
    • http://indemo.pl/Image/files/17158103045.pdfIn PDF document text
    • http://abyss.sk/userfiles/file/48513784464.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/20708848006.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/22650370727.pdfIn PDF document text
    • http://pskov.agisinfo.ru/uploads/content/files/81131730303.pdfIn PDF document text
    • http://giteduguedesboires.com/userfiles/file/foxowatapemusukavusudo.pdfIn PDF document text
    • https://parkettworld.com/upload/files/piropusedovajoke.pdfIn PDF document text
    • https://duvanco.be/docs/files/wasun.pdfIn PDF document text
    • http://preprod.app-nomads.com/ugecam/admin/ckfinder/userfiles/files/38076321635.pdfIn PDF document text
    • http://hzxgdz.com/images/upload/File/55023213943.pdfIn PDF document text
    • https://evrenmentese.com/upload/ckfinder/files/10296248453.pdfIn PDF document text
    • https://treasurehunterdetectors.solar-ovens.net/ckfinder/userfiles/files/dujatomanusezofanutuw.pdfIn PDF document text
    • https://viveironativodevicosa.com.br/ckfinder/userfiles/files/bejajijakukavo.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/31397339738.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=android+hls+sdkPDF 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_off0000b150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB150 10028 bytes
SHA-256: 0202c14a29b259f060b037614e887ddafbe54f61cc3ea16194e996a375e15cb9
font_01_sfnt_off0000c765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC765 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000df77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF77 14392 bytes
SHA-256: 4b111509b93aa39f4e0ed20865f27c466fb105913c9ce9e097500d63054bf660