Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbb235515567f3f8…

MALICIOUS

PDF

81.2 KB Created: 2021-09-01 12:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8760564aa1ac2d862456af06cf7a7e40 SHA-1: 58a8c3b6ce7dea916177788b77653b6ce0175558 SHA-256: dbb235515567f3f8433a87a34061fb2d10dfd210a77c743afa18f66024ad670e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, directing users to numerous websites, some of which are hosted on compromised CMS uploads or disposable domains. The embedded URLs suggest an attempt to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://mpwlawpa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/doroxumebelubebomi.pdf In PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160885c9c4ee21---44299326708.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/laxirebejafudigalowadupiw.pdfIn PDF document text
    • https://dijitalsanat.link/upload/files/88358792499.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/16071d0cce6479---58384734419.pdfIn PDF document text
    • http://boothbayharborshipyard.com/userfiles/file/48308801857.pdfIn PDF document text
    • http://2446665a.ru/ckfinder/userfiles/files/7169087374.pdfIn PDF document text
    • http://polletnv.be/uploads/files/90536252964.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/ant94vgm4uh9r31h97ps616av3/poxiporotaj.pdfIn PDF document text
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/xejabusosofedakim.pdfIn PDF document text
    • http://poongdung.com/FileData/ckfinder/files/20210624_65A6C6502813B4CA.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/hsnkq8mo9u92nphqig9r6bpapl/zugezejokexo.pdfIn PDF document text
    • http://dachastyle.com/userfiles/file/tepemunowu.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcdf5ea23e9---69025113828.pdfIn PDF document text
    • https://adrfarysz.pl/userfiles/file/70947182975.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/tujabujeve.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b8df9cbd4b---gibijivegejinizixadi.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e0e2ade3ee7---1244113780.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b4118292a22---94140470167.pdfIn PDF document text
    • http://teresachild.com/upload/files/pizizowuza.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/bd7826531f9a0f7c5505c1dc25ebdfa0/47692855379.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=what+does+volver+mean+in+spanishPDF 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_off0000d3eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3EB 10716 bytes
SHA-256: 469af4010754065a33719aa10a3ea950f7d28fa6498860d9e6a2aecadbef8a0e
font_01_sfnt_off0000ec52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC52 19348 bytes
SHA-256: 115ea4e7074428edea78f715295e375f6a6fee5fe66332d1ef536933a52b54d9
font_02_sfnt_off00011f2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F2D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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