Malicious PDF — malware analysis report

Static analysis result for SHA-256 9120169ead060117…

MALICIOUS

PDF

71.4 KB Created: 2021-09-09 07:58:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: c04ea42d9f3437741224e8d52a3a8bec SHA-1: c39d3e1ee91f449ecaaeb2a32cc98f0717f0bb75 SHA-256: 9120169ead060117f4abae2d3f07bf06c36b26fb5e6641f89e457f44a556356a
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://bio-obst-und-gemuese.de/userfiles/file/29019855506.pdf In PDF document text
    • https://indoshaolinkungfusociety.com/ckfinder/userfiles/files/32726465368.pdfIn PDF document text
    • http://tpokebar.com/uploads/files/pozowuwimibinosavogu.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/26787747401.pdfIn PDF document text
    • http://aptekarynek.pl/zdjecia/fck/file/boxebexipiki.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/gukazozobevabadafukulopef.pdfIn PDF document text
    • https://mma-montessori.com/admin/ckfinder/userfiles/files/78964570857.pdfIn PDF document text
    • http://stilna-ya.com/_userfiles/file/vizuvegidug.pdfIn PDF document text
    • https://tnmkor.com/FileData/ckfinder/files/20210905_B695AE77B16A1B8E.pdfIn PDF document text
    • https://kluchar.net/klucharnet/images/file/39217422046.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/dopew.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16131e2b4a6b1b---88479250881.pdfIn PDF document text
    • https://bibonatura.com/ckfinder/userfiles/files/94185384553.pdfIn PDF document text
    • http://aaz.sk/editor_uploads/files/73594109092.pdfIn PDF document text
    • http://ashokarefrigeration.com/userfiles/file/xizogegoneketoxuloj.pdfIn PDF document text
    • http://baby-daycare.com/uploads/files/202109030757349124.pdfIn PDF document text
    • http://sns.hu/_user/file/detogitukijogojelota.pdfIn PDF document text
    • https://dpengineers.info/admin/userfiles/file/27309226235.pdfIn PDF document text
    • https://worldpigment.com/image/upload/File/82208934164.pdfIn PDF document text
    • http://volvo-cars.jp/js/upload/files/wususetoxi.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/88333790783.pdfIn PDF document text
    • http://ouhkpthaa.org/userfiles/pevofikefamawejafoduferap.pdfIn PDF document text
    • http://seritour.com/rsm/files/jinevizivasuwadapuvoxub.pdfIn PDF document text
    • http://www.mediagrand.hu/data/editorfile/29059454871.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=ota+update+miui+12PDF 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_off0000b736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB736 10312 bytes
SHA-256: 9cc2b0bc146bc20e0af8cef5d1c032ee0552f1860635f99cc4aee63bae661b7b
font_01_sfnt_off0000ce94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE94 16072 bytes
SHA-256: 117f8231230de369ade0620b5ec08c6920d65306e2918d527fd66b7ef4ad1099
font_02_sfnt_off0000f7f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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