Malicious PDF — malware analysis report

Static analysis result for SHA-256 697a77ea750e8ff7…

MALICIOUS

PDF

79.9 KB Created: 2021-09-21 03:19:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: aabb006c45a8093253014bf6fbd79c14 SHA-1: ac3cff13a713fcdfcde03a1984ae2a6868651d60 SHA-256: 697a77ea750e8ff753ebc717f7252af3d4232cb6fbcb17c93fffe61847bfbe8a
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs that point to various websites, many of which appear to be compromised WordPress installations or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed as a link farm on disposable hosting, likely to distribute malicious content or phish for credentials. The presence of multiple external URIs and compromised CMS upload links strongly suggests a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://allytemp.ru/uplcv?utm_term=jumanji+welcome+to+the+jungle+filmywap PDF link annotation
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/e8f44133bdfb7a253198266d8cbfa892/51029159331.pdfIn PDF document text
    • https://taperagi.com/contents/files/lewifugixiroz.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fa0636b8cd---repop.pdfIn PDF document text
    • http://hanart21.com/files/userfiles/file/vemupedaligatopepa.pdfIn PDF document text
    • http://hosungtour.com/FileData/ckfinder/files/20210903_1DD372FEA7AA5328.pdfIn PDF document text
    • https://nistd.in/userfiles/file/5722597958.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/161318c4e44f66---rajonoxebaxem.pdfIn PDF document text
    • http://trendstyleimage.com/uploads/ckfinder/userfiles/files/radeneta.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/161490b802bddb---71869145642.pdfIn PDF document text
    • https://netcsemege.hu/ckfinder/userfiles/files/94191749815.pdfIn PDF document text
    • http://novichiha.ru/pic/file/damibadibamedinumewemiza.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fffb82b569---juxogenosototukoxukijaka.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/23167600094.pdfIn PDF document text
    • http://52fotki.ru/ckfinder/userfiles/files/13991853102.pdfIn PDF document text
    • http://www.prunay-en-yvelines.fr/ckfinder/userfiles/files/24297116430.pdfIn PDF document text
    • http://veewood.com/file_media/file_image/file/23271570032.pdfIn PDF document text
    • http://yonezawanet.jp/units/24250/zcycom/files/saxilunulotonenuwe.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/ririxarumesal.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16143ed01e63f1---nuvamufumubolujodabo.pdfIn PDF document text
    • http://lauraestetica.com/userfiles/files/zufenopematafoka.pdfIn PDF document text
    • http://geologicatoscana.eu/userfiles/files/28288542280.pdfIn PDF document text
    • http://branpc.in/ckfinder/userfiles/files/xizamexoxaj.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/nridbutkarjrdvi4hh50e6dm64/71119317883.pdfIn PDF document text
    • https://kawanmto.net/contents/files/44032147293.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_off0000d033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD033 11080 bytes
SHA-256: 43c7a20233ca8a35dbdc61b05aa86ab5b99c8da5d4eb24ee6f7888b57aa9f52f
font_01_sfnt_off0000e9e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E2 18616 bytes
SHA-256: 15474c6e4309b02bdbc3e1aa084c26b997f7c19f3a005c231ad7df8e63b6b01f
font_02_sfnt_off00011a2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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