Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e07cae49d5dfd03…

MALICIOUS

PDF

68.5 KB Created: 2021-09-28 17:03:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3918e8c8ab07a06fbf5a3951ea46f9d5 SHA-1: 7cf6cdf5551365808cb35b69fab7fec599d6389f SHA-256: 9e07cae49d5dfd03afc86115f3caf83f88c4e1313a93a4b3c4d489010d9b4233
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV. It functions as a screenshot lure, presenting an image to trick users into interacting with embedded links. The document contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting an attempt to distribute further malicious content or phish for information. The presence of external URIs indicates a likely download or redirection to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://oniceh.ru/uplcv?utm_term=download+apk+minecraft+1.17+cave+update PDF link annotation
    • http://veiligheidsslot.nl/ckfinder/userfiles/files/58122148913.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133f0de70df6---26640134408.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/66760743260.pdfIn PDF document text
    • https://marikakozmetika.hu/editor_up/muretopin.pdfIn PDF document text
    • http://boschvietnam.vn/files/usersfiles/files/dumazebazopulugijel.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16131fb0a8be29---7195931316.pdfIn PDF document text
    • http://obkladlazby.cz/userfiles/file/vukuligezaz.pdfIn PDF document text
    • http://www.ezmoving.com/file/jowomefaleriratogasuwefov.pdfIn PDF document text
    • https://dlt-nkp.com/fileupload/file/pusazuwiko.pdfIn PDF document text
    • http://immobilieninvestors.de/userfiles/file/pakixezigenizalifizej.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613caaabbac95---bipovigofokuzixogigokupo.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/1ee82e7e196bbc1aa55636ba40ac18d6/55880763866.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161483d1233ba3---36513890507.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/tosilusufesi.pdfIn PDF document text
    • http://sichera.eu/userfiles/files/xuxuraxiridemoraxazaka.pdfIn PDF document text
    • https://fond.ru/userfiles/file/zalibirawipujarixonewelu.pdfIn PDF document text
    • https://dalba.net/other_files/File/70996856463.pdfIn PDF document text
    • https://bodymason.com/user_uploads/files/kogitapurepedagalopokugof.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/rirurolomowunawobeki.pdfIn PDF document text
    • https://egc.ecrom.work/syo/files/depagaw.pdfIn PDF document text
    • http://mispuntossaga.com/campannas/file/49774312517.pdfIn PDF document text
    • http://seosanhrd.com/userfiles/file/dexukujitidisaxavober.pdfIn PDF document text
    • https://www.adoz.cz/ckfinder/userfiles/files/23488519737.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_off0000af91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF91 11124 bytes
SHA-256: 00efed7c652cf06d5280a911db02c1cd0048e1bf1a196c095a6d66f80900f414
font_01_sfnt_off0000c9a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e1b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B7 13832 bytes
SHA-256: dc05c1aeccdd273f2070832c3da459bc43225aa51a81295d04b691fbfd7ab2e9

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