Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e318d8e47918c5c…

MALICIOUS

PDF

602.1 KB Created: 2021-07-28 05:25:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: bbe2264a41991da94e373edbdaea2f4b SHA-1: e58d4c3ed912696037cb16f92fe1ca9c89350c1e SHA-256: 7e318d8e47918c5c4edb4ce50f2aff26891bc1200b52919ff3a691a9a4e7cb81
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress upload directories, suggesting an attempt to host and distribute malicious files. The ClamAV detection and ML classifier further indicate malicious intent, likely phishing or malware delivery. No scripts were extracted, but the presence of numerous links to potentially malicious PDFs implies a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6980

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/42f318228f457f7dbc3c006d77fe80aa/90554632862.pdf In PDF document text
    • https://an-professional.ru/img/files/file/pijamexadama.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/24195917802.pdfIn PDF document text
    • http://szpital-sulecin.pl/images/fckfiles/file/nobiduramavisokisejazax.pdfIn PDF document text
    • http://www.lebedosapartotel.com/data/yukle/files/83809813482.pdfIn PDF document text
    • https://aneri12.eu/res/file/dofigidanogimogobipojuk.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b5202a3b2a6---5044622142.pdfIn PDF document text
    • http://av-jet.ru/userfiles/file/47346674714.pdfIn PDF document text
    • https://beyondpins.com/calisma2/files/uploads/nidepaxaniwejet.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9802055a9---wawurezalavazuna.pdfIn PDF document text
    • https://2acontractor.it/images/file/56850624640.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1eb1cf734---notodenozata.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/c5db12e562e986cb7fdb598a65933962/jokafuro.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/1103f52590a2fcda113b4685162edf90/89440897625.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/f95c63cf28f580359dd70dcbb4a822de/97357939530.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2dd8d4139---wijeleb.pdfIn PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/dapoxitowafagatiret.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16072ae484057d---jamesarilukunezononigila.pdfIn PDF document text
    • http://shadesvalleymounties1969.com/clients/868959/File/sujanisifasojaxevedudo.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/19638106841.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/2fa165338b62fcdc908e1e5ad5314bb7/15833278009.pdfIn PDF document text
    • http://gardatrans.com/content/Files/99149433867.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/6c792b91916ede7df7bd2054df05dc58/93816609235.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=sonia+arnau+caleroPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0008bf8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF8C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0008d7a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D7A5 33584 bytes
SHA-256: 5126771f1ba1b17f9b6e1e33e13d8ec870dff7f10e17857ff89d245357de9001
font_02_sfnt_off0009223f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9223F 10132 bytes
SHA-256: 46c306ea5660b0737d20b69c78693d21cd3a125b1cca79c0121265aa4b397d47
font_03_sfnt_off000938fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x938FB 8596 bytes
SHA-256: 67159f23bffa97e6c110fadca63e2aee68e1f12a4f88b4eda0e9615757b505c4

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