Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e4164e6f8a62e6a…

MALICIOUS

PDF

293.8 KB Created: 2021-07-23 06:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: cc0900910e3c736526bc98f811b58aa1 SHA-1: b50f1b0cdca7e6955f6301887dc4ee05c5957a6f SHA-256: 5e4164e6f8a62e6a84f9f61d98a6f18ab802db524f2a889fb6b5b8de8206c101
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8730

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 http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16091b4c2237e4---vojivedi.pdf In PDF document text
    • http://lacasedescaraibes.fr/file/39445250443.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/fae9640501a455d9fd022ee65a02bf48/54631720021.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607446e4cf211---58794256517.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/f3c798b1583e19749855009ace3105c7/kalofiravojoxexunu.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078c5621f00e---84047567186.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/5khn963s4vtutdl64ua9d4ldr3/19275751202.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a528b12eb3c---migiwedukomiwugipuninelav.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/xataselozimuvuzoxar.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/4ooherqqc1kc0n66fkp9bv0s76/90363205759.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/ggnbapstfdnuo91ha0tsboj4kn/55207409952.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/gpe7ma298udd2ak2f6fpj0ufnm/76863448578.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/a77b89b2b4995a0a818cd70fcacc85b7/dakejojarizenunositabiram.pdfIn PDF document text
    • http://xinyuemu.net/assets/202106/files/20210624171332499954.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5fdb011573---tizikadonibixuripoxekif.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/24394793857.pdfIn PDF document text
    • https://webmenuplus.com/images/file/nowumogafosokowegibin.pdfIn PDF document text
    • https://pfhotel.gr/ckfinder/userfiles/files/kisixezixokixewasazev.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/a83818b133f0e7932619469bb0b5d25f/26172154897.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609de7b6160bb---xijekitolerigalogifipukez.pdfIn PDF document text
    • http://harlit.com/ckfinder/userfiles/files/20210703_154313.pdfIn PDF document text
    • http://advicetao.eu/pictures/file/rorezuzizibejotelovu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=have+compassion+forPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_009_off000437aa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x437AA 19504 bytes
SHA-256: 15197f7ab127fbc18da2e5fe6c5c66e73100fcbc0c7227fe4b33e563ac860fc5
font_00_sfnt_off0003f764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F764 25592 bytes
SHA-256: 27d5e356db48641bad99d9ab1a14066cd7b1115fc75b8d61373cc1732a5b667d
font_02_sfnt_off0004576f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4576F 10552 bytes
SHA-256: 5bdb270fc6224a27ed46bf5246baca082c40acbc5bf274df7e922be211ddeb5c
font_03_sfnt_off00046f70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46F70 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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