Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0301807a57698f9…

MALICIOUS

PDF

79.8 KB Created: 2021-09-15 04:13:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 36b2419fd3e0aa8b7b67db045fdeebe3 SHA-1: fe0e7adddef64f925503663a0c5f39050affc3b4 SHA-256: e0301807a57698f948acb869c12f3919660ed92d54caa45ab93774288a4e7633
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://easytravel63.ru/ckfinder/userfiles/files/67244599016.pdf In PDF document text
    • https://tomclarkvoiceovers.com/userfiles/files/57584485456.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/95269574688.pdfIn PDF document text
    • https://purefeeling8.com/data/file/18997584399.pdfIn PDF document text
    • http://cungcapbaoduongcuanhatban.com/upload/files/76588348039.pdfIn PDF document text
    • http://www.psoealora.es/ckfinder/userfiles/files/domazikuvitulagajuta.pdfIn PDF document text
    • http://hangtatmj.com/userfiles/xuwilifusag.pdfIn PDF document text
    • https://feldmann.pl/userfiles/file/jojevawerogisomi.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141277aabbfe---59323556217.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1612fabf95e2bf---tironuzepefep.pdfIn PDF document text
    • http://medob.org/SITE/files/editor/file/31411605906.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136d77a86691---88107205015.pdfIn PDF document text
    • http://hibertek.com/image/files/20210912_013619.pdfIn PDF document text
    • http://burbank.kopanramen.com/uploads/files/64136938594.pdfIn PDF document text
    • https://studiecarriere.it/uploads/file/84323031096.pdfIn PDF document text
    • http://timnhanhonline.com/upload/files/67194198370.pdfIn PDF document text
    • http://americansemitruckparts.com/d/files/96303057684.pdfIn PDF document text
    • https://safetyhanoi.com/userfiles/file/vobaxodexa.pdfIn PDF document text
    • http://kvrhousing.com/uploads/75924719703.pdfIn PDF document text
    • https://gtnet-engine.com/ckfinder/userfiles/files/7694753885.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/23593312319.pdfIn PDF document text
    • http://ventmetal.ru/userfiles/files/pevabazabeboruvubumak.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141471da4bbb---30607355022.pdfIn PDF document text
    • http://dekogard.net/deko/veri/_files/zufitozijapavat.pdfIn PDF document text
    • http://www.velkoobchod-man.eu/ckfinder/userfiles/files/13180109170.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/zujimemogusotuzapof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=hirak+rajar+deshe+full+movie+123moviesPDF 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_off0000d123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD123 17684 bytes
SHA-256: aed2bb2d6a8dd307f198b4c2cb77d72c3c0e03002ccdf5c713804a2cb9e8058e
font_01_sfnt_off0000ff4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4C 11140 bytes
SHA-256: 579f9793c9f9c0e8ca223375230a3b5b71751a278c062b777923c6c16f63b98e
font_02_sfnt_off0001195a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1195A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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