Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e2981d999cfdedb…

MALICIOUS

PDF

81.2 KB Created: 2021-09-05 09:23:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fb3de8803762cb83455065cf5d6f08fb SHA-1: 543af4605704bde3177b3a441952b70dee24c04d SHA-256: 9e2981d999cfdedb2a966e5b7c4f4c08c7af6733ae58f37f2c276b1d0b43fe67
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to obscure the ultimate destination. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this is a phishing or malware distribution lure. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://canionglobal.com/FCKeditor/file/balufavonimirofusozali.pdf In PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b77336ada08---49204148898.pdfIn PDF document text
    • http://dilimkebab.com/userfiles/file/newinubav.pdfIn PDF document text
    • http://phayaotechno.com/UserFiles/File/71419789083.pdfIn PDF document text
    • http://asustainable.com/global/file/movazupebu.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/61723342150.pdfIn PDF document text
    • http://daedukgs.com/admin/fckeditor/data/file/20210601070239.pdfIn PDF document text
    • https://et-auditing.com/userfiles/files/wubovubevavolunub.pdfIn PDF document text
    • https://discovercefalu.com/_data/images/file/43784582966.pdfIn PDF document text
    • http://drlalashow.com/php/billboard/uploads/file/43080106043.pdfIn PDF document text
    • https://zlato-eu.cz/upload/files/fajelak.pdfIn PDF document text
    • http://hcstonetw.com/uploads//files/202108100646579447.pdfIn PDF document text
    • http://ipllaser.in/uploads/kofitipevaxiwu.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160877a9344e02---21542269907.pdfIn PDF document text
    • http://blackivy.pl/userfiles/file/danulodabewaxijexemube.pdfIn PDF document text
    • https://astoraccessories.com/uploads/ckfinder/files/newedijagidepesakevid.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160768ba4703c8---ximatolozibanofonabi.pdfIn PDF document text
    • http://toshiba-center.ru/uploads/files/1217488000.pdfIn PDF document text
    • http://blackshirts1962.com/clients/f/f2/f245580d3072b78cda2271cf7a7e3f61/File/10143370976.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/22760693255.pdfIn PDF document text
    • http://all4pets.cz/ckfinder/userfiles/files/88336870482.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/18c54f2536e90b63ef4e5c7834410a7e/savofalugojurilarilutet.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/ofdm215dd0vop6a340pis51kj0/fadagexow.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/93ae5aa9568ca97b436279191efa5f34/gubuwiw.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbcd5ddea2---dudogetetujoji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=covariance+and+correlation+pdfPDF 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_off0000d9cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E4 10544 bytes
SHA-256: 83606b80784145824328d7271e57b3c996200c55440a5f4070caab1e1abbfe18
font_02_sfnt_off00010a0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0A 17360 bytes
SHA-256: f7d6e73af403becd64c4c4a9ecaf2e9a64556c45a8bf083737c46c2b39919654

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