Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0e6a480fa826a8e…

MALICIOUS

PDF

74.6 KB Created: 2021-09-19 07:02:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f3a4377f8d6c355961b293cd5a24b2b8 SHA-1: a6f505decd24bfa5cce07e433ce07e16d53a2989 SHA-256: e0e6a480fa826a8efd02ae7a16483acf127c1947e1bae2ec5a79bb1638a187e5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm directing to numerous URLs, several of which are hosted on compromised WordPress sites or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or serving malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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.
  • 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://shinies.ru/img/lib/file/bupevizuvopevejivegojasiw.pdf In PDF document text
    • http://itineraire-consulting.com/ckfinder/userfiles/files/98158298988.pdfIn PDF document text
    • http://sqc.jp/user_data/editor/ckfinder/core/connector/php/upload/files/wafigimokazimej.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/vaxesadepizudalizejun.pdfIn PDF document text
    • https://cashcruis.ru/wp-content/plugins/super-forms/uploads/php/files/9cace0548151039f558e7df1d020645d/66688002016.pdfIn PDF document text
    • http://hb1004.com/userData/board/file/tiwasivajinaseda.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/161380aa7b6df7---kezurogewekaforibovev.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/tenumof.pdfIn PDF document text
    • https://searchlink.org/userfiles/file/86418634725.pdfIn PDF document text
    • http://sea-cruise.ru/ckfinder/userfiles/files/34876800423.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16139f48c957e0---jowisilegazisarigipumo.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/52b05fb066f2020e2850cf508b9175e2/48158294919.pdfIn PDF document text
    • http://gwtcs.org/Content/uploads/files/kitadudepiterike.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/2e80516ea3a2e824738d23f4f04b7210/55752501426.pdfIn PDF document text
    • http://mbfeed.vn/upload/files/vigarajob.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/jelesokanisonapige.pdfIn PDF document text
    • http://espwireless.net/uploads/file/22984607755.pdfIn PDF document text
    • https://hantverksakuten.se/ckfinder/userfiles/files/1240629637.pdfIn PDF document text
    • https://www.pepinieres-gey.fr/ckfinder/userfiles/files/2157899236.pdfIn PDF document text
    • http://fotocaroli.it/userfiles/files/59845027053.pdfIn PDF document text
    • https://xn--90aoja6ahg5ds.xn--p1ai/uploads/files/marud.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/pajiginaw.pdfIn PDF document text
    • http://aktien-analyse.de/images/File/78906511634.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/60343744286.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=cool+math+games+happy+wheelsPDF 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_off0000c1e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1E8 10632 bytes
SHA-256: 5c2bcfb940db19736553825523fd2099afd03bf5d9121397703f884897ee81d0
font_01_sfnt_off0000da67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA67 16504 bytes
SHA-256: 0909e40a31cd730b5b0b446599a41f0e35cd11ab1613c71c3f6bc2d85b1fc15e
font_02_sfnt_off00010520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10520 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1