Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0f9a324f4cd1aa1…

MALICIOUS

PDF

111.9 KB Created: 2021-07-02 09:46:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 4b584c4bab411958f084fd601dc2efde SHA-1: dafb4bc0507063776de22360a0f5dc8ab939af2c SHA-256: e0f9a324f4cd1aa18b637fb8a6b3cb8c2b9518e0d621fbb7daab10e83bb4d39c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL structure and heuristic firings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://aljazeerahdrilling.com/userfiles/files/38801061470.pdf In PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c51a30cdeca---23317021454.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/d677e83f04632972f9a66e5942b52350/mowujirupewasevogamugukum.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/83098736940.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/74595303017.pdfIn PDF document text
    • https://am-system.eu/ckfinder/userfiles/files/wavogabe.pdfIn PDF document text
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/nl9g5ntb9furqqs7fftaf1fele/21032583523.pdfIn PDF document text
    • http://trungnguyenjsc.vn/uploads/image/files/tawipizalerogivukus.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16074538e81879---vixunawata.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16078872faa581---11889669413.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd1c306d6f---vovowamepok.pdfIn PDF document text
    • http://healthywithhart.com/res/file/zabaguzowifefozerarile.pdfIn PDF document text
    • http://carroll1975.com/clients/4/4e/4e2b018d07aaa5a30c3e4fca1c7a8df7/File/dewuduxemulofev.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/8fe76bcd82ec37902926b107fe76920e/lomatokijofalavurapi.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6cb830ac1---18417008633.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/cacff78ee1aba3510d9d0a91b2bd4023/50702646797.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/21141528980.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/iprtj9amk2kcaj73457k55a28h/xukiwasexo.pdfIn PDF document text
    • http://abwmarlboropike.com/uploads/files/surewuluk.pdfIn PDF document text
    • https://essaidafm.com/uploads/FCK_files/file/luregixid.pdfIn PDF document text
    • https://miguktour.com/FileData/ckfinder/files/20210617_BB65E54E9C4F093D.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/fijenisonaronada.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/jebujewosawolali.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a83e20a3288---50085502022.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=bsbmgt516+facilitate+continuous+improvement+answersPDF 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_off000150c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000168dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168DC 11624 bytes
SHA-256: b5c7df38976c3ed03c1fdac9d449126164b339f247513128ddac9a8e54cfa7d5
font_02_sfnt_off00018478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18478 17392 bytes
SHA-256: eb2e8d90ff21adf18989024996f6c9d8eaf82b095777ef0a012744569d9d1eb7

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