Malicious PDF — malware analysis report

Static analysis result for SHA-256 07bc550567cf2528…

MALICIOUS

PDF

84.5 KB Created: 2021-09-03 16:43:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2e75f90ea042452232cba624c6d67344 SHA-1: a1bc60ee3aba2456683edf013aed3359b1641fd9 SHA-256: 07bc550567cf25283646d6eee44dfabd9d3c50424f51b05c333ecf75de774fff
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 links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to potentially malicious content or phishing sites. The presence of multiple distinct hosts and the use of 'utm_term' parameters indicate an attempt to manipulate search engine results or lure users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/cb3dc84322383320d397635e5060e09e/nowusunasefanolotapegaj.pdf In PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/8ce16e22c9fd63dbb10dcc83c84b1f0b/66583101586.pdfIn PDF document text
    • http://transinfosoft.com/userfiles/file/lulifelakedinemone.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/34125836827.pdfIn PDF document text
    • https://futurefacesmiami.com/uploads/file/buboduxorokokozefuf.pdfIn PDF document text
    • https://selapro.com.au/application/third_party/ckfinder/userfiles/files/1861580544.pdfIn PDF document text
    • http://zzliuxue.com/upfile/file///95807657022.pdfIn PDF document text
    • http://bigxra.com/uploadfile/file/2021051719221273499.pdfIn PDF document text
    • http://piqiso.ru/userfiles/file/39602224877.pdfIn PDF document text
    • http://bycongroup.com/UserFiles/file/31160638580.pdfIn PDF document text
    • https://people11people.com/uploads/File/sovibagivufinemivumewij.pdfIn PDF document text
    • https://tomclarkvoiceovers.com/userfiles/files/41313797731.pdfIn PDF document text
    • https://aalatour.com/basefile/b2caalatourcom/files/dalulo.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076bf5a9f707---51343036473.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160779a57123cb---jopogejonojuliril.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/nvs5couegdunvar57he28aimm1/569557607.pdfIn PDF document text
    • https://loctra.net/userfiles/file/xozabedinatexakefejarirab.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c77949a2b8---rulebatenolunabezemap.pdfIn PDF document text
    • https://thic.net/plugin/ce1/ckfinder/userfiles/files/malezezidikibasojif.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/5sjn3obofti4o66gc0a6ruggu5/38543062176.pdfIn PDF document text
    • http://www.szphotar.com/admin/img/files/442989803.pdfIn PDF document text
    • http://xn--rssx31a7tec6p.com/upload/userfiles/files/20210903081430.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b42c5c1ba33---faginided.pdfIn PDF document text
    • http://extrastyle.ee/ckfinder/userfiles/files/dokazoxumezomevesogobifej.pdfIn PDF document text
    • http://fernandopelosini.it/userfiles/files/bodaxesagigog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=xiaomi+mi+home+camera+manualPDF 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_off0000e598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE598 10336 bytes
SHA-256: 0b93c4b12cbc7a1b90c1c9f9fd6db6b58e590e1c736bcc317b4716a99a8a17f1
font_01_sfnt_off0000fc9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9B 18048 bytes
SHA-256: dffe3ad8d153d65f4f08b72f9df75f6df6ab7b5bd0395e33d9c49957cd531825
font_02_sfnt_off00012bf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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