Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e2b7069bdd169da…

MALICIOUS

PDF

79.4 KB Created: 2021-09-14 01:46:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4d8e840849c9e9f725eaa5878955a807 SHA-1: 210ab637514126c5e2eb7c722a006eade86df790 SHA-256: 1e2b7069bdd169da4db2b86c87305a09c996beb18eb10943973662f77a36c799
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as a malicious PDF by ML classifiers and ClamAV. It contains numerous embedded URLs pointing to a link farm, suggesting a phishing or SEO manipulation scheme. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a high likelihood of malicious intent related to link distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://tour-paris-guide.com/cite_imgs/file/furazuxokozuxewazoj.pdf In PDF document text
    • https://clubsecurite.fr/webroot/upload/files/negavokopakabugiberakeji.pdfIn PDF document text
    • https://granitabrasive.com/editor_up/bejalagu.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161372c7e2fdc3---danadaxomezevogufiwajo.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/xibetodeparugako.pdfIn PDF document text
    • https://mangalargalux.com.br/ckfinder/userfiles/files/31217584522.pdfIn PDF document text
    • https://www.auto-ecole-rive-droite.fr/ckfinder/userfiles/files/domerov.pdfIn PDF document text
    • http://kleinschadenexperte.de/userfiles/file/14299090316.pdfIn PDF document text
    • https://suprizpin.com/calisma2/files/uploads/gegexadowafazigebupazote.pdfIn PDF document text
    • http://mirai-kankyo.com/userfiles/files/jizutoriniwaxew.pdfIn PDF document text
    • https://mmgrowersg.com/ckfinder/userfiles/files/91855976172.pdfIn PDF document text
    • https://jv-cms.crazy-jessie.nl/uploads/files/35835622957.pdfIn PDF document text
    • https://buzascsaba.hu/userFiles/file/20342492402.pdfIn PDF document text
    • http://dezmaster.com/userfiles/file/korubemilifuxovas.pdfIn PDF document text
    • http://testplanet.nl/uploads/files/71803106107.pdfIn PDF document text
    • http://bapassamarinda.id/assets/ckfinder/core/connector/php/uploads/files/92560378525.pdfIn PDF document text
    • https://ratsimae.ee/media/contents/file/jomikowanef.pdfIn PDF document text
    • https://dalba.net/other_files/File/kuvuvefudowebavevugan.pdfIn PDF document text
    • http://grimastone.ru/files/21503086936.pdfIn PDF document text
    • http://iiiemjobs.com/FCK_Editor_Images/files/damomikuminow.pdfIn PDF document text
    • http://khacvietlaser.vn/public/images_news/files/jajadazexidiwuluvamukaton.pdfIn PDF document text
    • http://potentialdesign.cn/userfiles/file/1630987352.pdfIn PDF document text
    • http://rapabzenec.cz/obrazky/files/jomipamuforokikotaxatex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=download+house+party+androidPDF 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_off0000c91f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC91F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE131 20524 bytes
SHA-256: 66f8d3eb8ad4a8c7192b09963145e6411faebfcdbba7729c85427ef49572d86e
font_02_sfnt_off000116ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116BA 10792 bytes
SHA-256: 73323ee1ebdbe1977466503907f2a5c796518872c40ddd300d3e9df8d2a52980

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