Malicious PDF — malware analysis report

Static analysis result for SHA-256 e120d52420e5dabd…

MALICIOUS

PDF

68.4 KB Created: 2021-10-01 14:18:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5392d9d84b1531e9779ff107a7e9d0bf SHA-1: 47a866bcf39df8e1f14c945e1eb7dd7370408792 SHA-256: e120d52420e5dabd4aebeda7799dc7a45a5b2823db3402de42dc5b857b76759e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is a PDF identified as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple domains, several of which are hosted on compromised CMS platforms, suggesting a phishing or malware distribution attempt. The document's structure and embedded links are consistent with a tactic to lure users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/161380a97b26c7---mitatusalo.pdf In PDF document text
    • http://anhbanglaw.com/userfiles/file/luxabol.pdfIn PDF document text
    • http://bukharageorgia.com/sites/default/files/file/sukixugosajiv.pdfIn PDF document text
    • http://kriosispl.com/cote_dor_import/admin/ckfinder/userfiles/files/20704986796.pdfIn PDF document text
    • http://hydrem.ru/images/file/gujoxexamezovidomojobomiz.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/95fb10334cff701444a15b6494632f47/pazuzatedafitudupi.pdfIn PDF document text
    • http://capesociety.ca/uploads/files/wotalosesawibawufaxag.pdfIn PDF document text
    • http://imoroz.by/upload/file/27015555584.pdfIn PDF document text
    • https://hamzsabegi60szallo.hu/UserFiles/File/tokukagibufukog.pdfIn PDF document text
    • http://klawiatury-foliowe.pl/_data/file/37951788180.pdfIn PDF document text
    • http://giaydantuongphongngudep.com/images/news/file/nulidolopel.pdfIn PDF document text
    • https://idroilektriki.gr/files/file/xuzopusefedususiluje.pdfIn PDF document text
    • https://alshuka.ps/ckfinder/userfiles/files/mixof.pdfIn PDF document text
    • http://chernogolovka.inhome360.ru/admin/ckfinder/userfiles/files/norodibezobipipafajuwa.pdfIn PDF document text
    • http://funkyspa.net/ckfinder/userfiles/files/lozipelubovejovadukema.pdfIn PDF document text
    • http://handsonmontessoripk.com/userfiles/files/52308060831.pdfIn PDF document text
    • https://www.psk.com.au/application/third_party/ckfinder/userfiles/files/89860585839.pdfIn PDF document text
    • https://888nv.ru/userfiles/file/30364259382.pdfIn PDF document text
    • http://mentor-tutor.com/newGroserLikeProject/uploads/files/zezugetoselubezexez.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/p7brkdse2aaotb81dqfsjnjetf/68152690380.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/zabunejigejonanon.pdfIn PDF document text
    • https://artbynela.com/uploads/file/gizeratex.pdfIn PDF document text
    • http://world-spa-resorts.com/dok/75463406789.pdfIn PDF document text
    • https://rtvpuls.com/ckfinder/userfiles/files/sudipezawowurejogofoxuxor.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/nasosetuxonugipojewixid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=cleo+san+apkPDF 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_off0000b06d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB06D 14928 bytes
SHA-256: 9f5e2c509b0ca6c08eb001b4bfaa2dbb4553654325af07dede2bb76c094dfda9
font_01_sfnt_off0000d5df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000edf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF6 10076 bytes
SHA-256: 21b9b7fc9300e1bd088cbeaa3ca23521f871834af12bcac02d6e2f9a00db2840