Malicious PDF — malware analysis report

Static analysis result for SHA-256 f065d8f18bd26b6f…

MALICIOUS

PDF

285.7 KB Created: 2021-07-23 03:53:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 93f18fbbd1f939837d5805e845228f22 SHA-1: 0185e64dd3b96d0cd31125b643cd03be31587ca7 SHA-256: f065d8f18bd26b6f09ec9037debb4fd8992b5c9faecde9434ed64fc2d84c3dbc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress sites, suggesting an attempt to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing lure, potentially leading to further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://charivne.info/images/file/85211292842.pdf In PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a290f31d30---47197626311.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dccecec1a67---65298574256.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c6b84f186---tixepeni.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d10e84f96---68260470399.pdfIn PDF document text
    • https://hse.tw/upload/file/18239147950.pdfIn PDF document text
    • http://xn--b1adcbbai1bezln.xn--p1ai/content/File/36513253958.pdfIn PDF document text
    • https://bettyloupaints.com/userfiles/files/87024754134.pdfIn PDF document text
    • https://ukmriptek.org/codeIgniter-hmvc/userfiles/files/lusuram.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a45f5d4f369---weminapupobugaweviwuduv.pdfIn PDF document text
    • http://ipsgroupjjn.org/userfiles/file/tidurewigerudo.pdfIn PDF document text
    • https://fisheaglesafaris.net/pics/user/file/vobemerikudefiloto.pdfIn PDF document text
    • http://osteriailgalloelinnamorata.com/userfiles/files/rasinamaj.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160733bf385a3e---segoru.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/kizonumiv.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5ad3ba9b85---66977073374.pdfIn PDF document text
    • http://www.dreamstoreonline.es/ckfinder/userfiles/files/lixijulafagidojaxujaronex.pdfIn PDF document text
    • http://shssailors1969.com/clients/3/36/366f78b21138e0f8005dfe6cc5e09e30/File/40266792064.pdfIn PDF document text
    • https://vvpta-irvine.org/userfiles/file/detufaxofifusamusu.pdfIn PDF document text
    • http://permanentnimakeup-brno.cz/userfiles/files/tejojuderafakilixivebebum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=king+lear+contextPDF link annotation
    • https://mediaget.com/userfiles/files/60457819143.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_off0004079f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4079F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00041fb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41FB6 10332 bytes
SHA-256: 078bdc00ae185008b50f9654ee3b2ea415fc057f84bfeaac33998e792c55daa3
font_02_sfnt_off00043722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43722 19452 bytes
SHA-256: 712d54e19d372419b69fc327b68b4b62b4313782a918ccf2b76e6724f8cd05e5

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