Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1d74808ee03fa6d…

MALICIOUS

PDF

69.9 KB Created: 2021-10-04 01:54:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 9a0c780e50907f7609df799384e471b1 SHA-1: 35df50b5e8d222b902676ad0e8820f9c808479be SHA-256: e1d74808ee03fa6d70ffb439603519d62cc24616d8963f0c03d4b87f55acfad5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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://drafthe.ru/uplcv?utm_term=meaning+of+sdh PDF link annotation
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139055772d0d---46744389440.pdfIn PDF document text
    • http://zzzwchem.com/upload/files/pubibofade.pdfIn PDF document text
    • https://limadelimon.com/images/file/lujoxapinoduronopurak.pdfIn PDF document text
    • http://acevina.com/webroot/img/files/19053887156.pdfIn PDF document text
    • http://tensoinox.com/userfiles/files/kidomesowodidinokus.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/88254983898.pdfIn PDF document text
    • http://katachizu.com/img/news/files/zekixinukizasetozofiboba.pdfIn PDF document text
    • https://beldapromosyon.com/calisma2/files/uploads/7138764733.pdfIn PDF document text
    • https://www.frontieregypt.com/sites/all/libraries/ckfinder/userfiles/files/gilifinum.pdfIn PDF document text
    • http://sanraimundo.cl/dyn/uploads/file/55235503327.pdfIn PDF document text
    • http://euro520.net/userfiles/file/16332281601253586986.pdfIn PDF document text
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/81559641258.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/wipetal.pdfIn PDF document text
    • http://connectcontrol.net/files/userfiles/files/fakofesobarad.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1614c1c2f17404---53427976033.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/2a07b770605cbb40965a498498dea99e/takezoluru.pdfIn PDF document text
    • http://agrocare.hu/ckfinder/userfiles/files/12689178036.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16131b2bb51c8a---26601955666.pdfIn PDF document text
    • https://gjbuyerbroker.com/userfiles/file/sokaxipade.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1614615129fb12---59062233283.pdfIn PDF document text
    • http://www.its-dph.cz/admin/fckeditor/editor/userfiles/file/12870817790.pdfIn PDF document text
    • http://jingyitech.com/uploadfile/58219100454.pdfIn PDF document text
    • http://bodamvientin.com/uploads/userfiles/file/65726954059.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16151d543bfac5---50906428605.pdfIn PDF document text
    • https://traveletrust.com/basefile/traveletrustcom/files/xovumuro.pdfIn PDF document text
    • http://arcenevents.nl/site/upload/files/nikepatifate.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/14259149df4e5d1216845d2f38878389/lidinakokiwejalupolunuw.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_off0000b324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB324 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB3B 10380 bytes
SHA-256: acc0f04c3a9890f39e954c1cbb05f782b4f44ed7efbd6a5fc79e9c45244aa990
font_02_sfnt_off0000e26a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE26A 15696 bytes
SHA-256: 1cd5bd4f980b7bc7befbbaccdc62ace226d1f873d31c524bfc50c11a296784bd

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