Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc469cd7c19c684d…

MALICIOUS

PDF

82.3 KB Created: 2021-09-20 17:21:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6198b7680d8c52f584d927c62078abdc SHA-1: 806744b8e7edd907c3f0b821e5eca49404e90223 SHA-256: cc469cd7c19c684d6ebf41feee71712025aaceff2e6e5cc1413af4c2457ef9e4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to lure users to malicious sites. The presence of embedded JavaScript further supports its use as a delivery mechanism for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://konemara.hu/userfiles/file/kafomakarusepiralat.pdf In PDF document text
    • http://modernplating.com/userfiles/file/70722223680.pdfIn PDF document text
    • https://harshahometutors.com/uniformkontakt/userfiles/image/files/miwirezomo.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/161393251d5c66---lazimasisogok.pdfIn PDF document text
    • https://tfsroanoke.com/home/tfs/public_html/new/ckfinder/userfiles/files/24105114923.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613a7cbaa9ec8---tunowovebozoxim.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135d9551edc3---mazudobew.pdfIn PDF document text
    • http://abpaluso.com/upload/file/vupogediped.pdfIn PDF document text
    • http://www.galiantsolutions.com/emailimages/file/majapuwojitaxirupabusa.pdfIn PDF document text
    • https://xcheck.vn/uploads/userfiles/file/52106406965.pdfIn PDF document text
    • http://aurora-c.jp/files/files/wejidoluwi.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161430437c9369---nigijil.pdfIn PDF document text
    • http://jakpaisanestate.com/images/upload/files/wixawulovakinas.pdfIn PDF document text
    • http://nrgmedia.hu/files/file/92718307974.pdfIn PDF document text
    • http://pk-rowery.pl/user_pict/file/11316986333.pdfIn PDF document text
    • https://penzionradvanice.cz/res/file/3443009484.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138a20777f4f---wekasebunup.pdfIn PDF document text
    • http://rmgoals.com/userfiles/files/sirorenofopupifalikota.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134ff669f1e1---konuvolelevifanigew.pdfIn PDF document text
    • https://hitourkorea.com/FileData/ckfinder/files/20210901_181A0056C7A6336C.pdfIn PDF document text
    • http://innersolutions-uk.com/file/fazixi.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1613f91c6f2531---2846409172.pdfIn PDF document text
    • http://cerrutistudio.eu/userfiles/files/gejaxotixatotik.pdfIn PDF document text
    • http://albarossa.jp/js/upload/files/kejovo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=download+football+manager+2020+for+androidPDF 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_off0000dc58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC58 17616 bytes
SHA-256: fd4a3dbb6a22596f1e3ce098afd0a49272fbda5ba3eaf9358d97acbdc8dbb631
font_01_sfnt_off000109a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121BD 10996 bytes
SHA-256: bb5f38cb442270ccf374e3adb3a61d8fc8797091bcc3e0ed8ccc9bdaee0870c1

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