Malicious PDF — malware analysis report

Static analysis result for SHA-256 018786e8887b66d4…

MALICIOUS

PDF

275.7 KB Created: 2021-08-05 01:00:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: eaba8b4a0ea2e6fe5a5f69025808cd24 SHA-1: ac23b0a01df9692473f521a37cbbda0606cbd80f SHA-256: 018786e8887b66d44bfe60e7d25a8d2f3e954e2e8a37f70206b6e58e8638765f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9802

Heuristics 5

  • 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.
  • 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://wastran.ru/uplcv?utm_term=how+to+reset+kenwood+navigation+system PDF link annotation
    • http://smartcevent.com/clients/871459/File/kiwonemapusejudaxuxi.pdfIn PDF document text
    • https://murtenhof.ch/userfiles/files/72422954653.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/3c8a129c857cf049c07041bea436ff76/lenopedixozopuxisu.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/cf7544e3ec324d899202653467fa9d00/pamapopefonubutodedenegos.pdfIn PDF document text
    • http://moyamoya.center/images/hand_uploaded/files/26652108315.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8909bfbdb---84504014215.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073968691705---juwijujuxu.pdfIn PDF document text
    • http://avandcie-automation.com/ckfinder/userfiles/files/lidodorujem.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc34ef1efa---3387413464.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/19390263141.pdfIn PDF document text
    • http://iphonedown.com/ckfinder/userfiles/files/92205320110.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/rtgc4vd0ks10r9akqps7te8cgt/xekadafo.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae26690acca---65966126942.pdfIn PDF document text
    • http://zonweringbelgie.com/ckfinder/userfiles/files/71324713178.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160b4b5a76d096---76126824101.pdfIn PDF document text
    • https://keluargamimpi.com/contents//files/57775041887.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c96a9007ec---14574221862.pdfIn PDF document text
    • https://ksuskalology.com/images/file/tuxeridigojijenalerike.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/712f77562f1d26f6763f56da8fcb1eea/bixanopafozibiwowiv.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/c68f800f1673c661d54b952240af1a17/77709366603.pdfIn PDF document text
    • http://uptownherndon.com/uploads/files/11632107287.pdfIn PDF document text
    • https://tl-systems.hu/files/files/72600140836.pdfIn PDF document text
    • http://jkbprivateiti.com/userfiles/file/58544344311.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6db325398---97938857904.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ddf289c05a---89908558961.pdfIn PDF document text
    • https://mepho.hu/ckfinder/userfiles/files/87496076393.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_off0003d959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3D959 20168 bytes
SHA-256: 3a7ce85c1f70734a101c0bd46436195df430ad2d9e266ad1749495150f960212
font_01_sfnt_off00040e61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x40E61 10896 bytes
SHA-256: b92747859cec1cad034b47c0350190653c43a3e741dfb08ea7de2d9ae1aea8a6
font_02_sfnt_off0004276f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4276F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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