Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee745b25514d7ac…

MALICIOUS

PDF

90.5 KB Created: 2021-07-02 02:14:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 06daf47ed152869f3313cafb294a7d3d SHA-1: 841215d653db641ee72ecee033c44c5e1e0ba43e SHA-256: 0ee745b25514d7ac142dda7496c56263331de4a1bb9e61f7d245fbdb8a25e304
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised CMS upload directories, suggesting a link farm or redirection strategy. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malicious redirection attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • 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.
  • 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://philabc.ru/uplcv?utm_term=the+prime+factorization+of+28 PDF link annotation
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160891ea46f0cb---97280683421.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/tmp/galawubeposoru.pdfIn PDF document text
    • http://jordanfamilyreunions.com/clients/5/51/51534e3e38036466a76ca8a024fd4923/File/wabeberuxadedasolewa.pdfIn PDF document text
    • https://estoniapools.com/contents//files/16977091923.pdfIn PDF document text
    • https://ises.ca/phpsites/vertical_living/uploads/file/zivadusugebake.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/1607076d49f962---zapadamibaluxubiveduxuku.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609ceae4555b2---geralogiwizij.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/5453c08a42217d9a8ff071f8e7f02b6e/52279617254.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/03407ad1cb58dd3411e30d23baba6e35/95919554255.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f3c047f5b---vaveperogidafasapupoteso.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160d05bf6b7ce0---1031045849.pdfIn PDF document text
    • http://drwatsonsr.com/clients/2/2b/2b9a0cf27321ceab3a47fbd10bf94d34/File/fekosoxep.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/9rorp33j51d971h9277ju6vbnb/gipibikusikadojil.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/0a860ea6ed3bea7cdce9c3fab9e689c8/23200232564.pdfIn PDF document text
    • https://journeywithmypet.com/ckfinder/userfiles/files/sutiz.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/39211136489.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/63121533014.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160872098495c6---98463186496.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/8f3a012d79bd60c4fd4cb56f85ffcfba/fukatofevig.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/52410012970.pdfIn PDF document text
    • http://macap.nl/app/webroot/files/userfiles/files/42450753714.pdfIn PDF document text
    • https://maturana.cl/upload/file/47119175330.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b3558f62767---7023175855.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/lelufakajavojasub.pdfIn PDF document text
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/12b7ca262186c3b0f5c564d7a447bcff/36255019852.pdfIn PDF document text
    • 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_off0000fe7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7D 10884 bytes
SHA-256: cd8387d0630c774e7e3ccd4553c886db8d16213cfd594c966f4b832732ae9ab1
font_01_sfnt_off00011793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11793 17260 bytes
SHA-256: e9442f4b3dbbed1c6052c2a26c3d40fc0a518e3b811ee3c876277eba46f2d67e
font_02_sfnt_off000144d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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