Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb2a00a122016f5c…

MALICIOUS

PDF

68.8 KB Created: 2021-09-26 12:16:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 01762ceb1eafb3d01a237540987a99e8 SHA-1: 834327eee492fb537e22bc1df6ba25d7a1d09002 SHA-256: eb2a00a122016f5cfd199dfe5c0769cc553bba299b28b4adac25c9401df511d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many of which point to link farms on disposable hosting or compromised CMS upload storage. The primary function appears to be directing users to external sites, consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://atya.eu/files/file/81429259262.pdf In PDF document text
    • https://leifs-auto.dk/images/file/sixilumunuzogulidimuga.pdfIn PDF document text
    • http://safiorida.dk/operatori/userfiles/file/mexozeko.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/gemizatewafaroxupajomima.pdfIn PDF document text
    • https://toocapen.com/files/18969126117.pdfIn PDF document text
    • http://bluebirdcanada.com/FileData/ckfinder/files/20210916_BF783218F85FDDAD.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613728b364001---80723345065.pdfIn PDF document text
    • http://lube-stc.com/ckfinder/userfiles/files/62885751486.pdfIn PDF document text
    • https://vgk.tw/upfile/files/2021/09/21/vuzuwasutozugesowibokax.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/vcbvfu7elq8r064t0b938gg7c4/51502350967.pdfIn PDF document text
    • http://synergyproperty.com/images/files/38510141568.pdfIn PDF document text
    • http://globalsublimation.net/uploadfile/files/2372456472.pdfIn PDF document text
    • http://allivecoat.com/userData/board/file/bukelerigawejened.pdfIn PDF document text
    • https://dongciao.com/uploads/files/202109181915558448.pdfIn PDF document text
    • http://xn--80aikni6a0b.xn--p1ai/images/file/63726811535.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/83154663825.pdfIn PDF document text
    • http://newo.ru/files/files/lipusonulipimoritadeped.pdfIn PDF document text
    • http://studiosantese.eu/userfiles/files/likipu.pdfIn PDF document text
    • http://klick-tipp.info/ckfinder/userfiles/publics/files/tumegudalukebularevamex.pdfIn PDF document text
    • http://rayer.cn/d/files/munenax.pdfIn PDF document text
    • https://sensesgrouphk.com/louis/STARKGROUP/ckfinder/userfiles/files/93395472179.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/9eb1ce0984accde864b15f0d86f1a723/rexijaninofewizisavakoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=qr+code+blast+jinniusPDF 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_off0000acfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC510 15864 bytes
SHA-256: ecf7b1f7d56ca209f76f8a6c46b01c54f365381bc8b4c557e7de5f0e8ba4cfd0
font_02_sfnt_off0000ed5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5E 10792 bytes
SHA-256: 273c7721fb565c351e473240968b68677c608a14aed5a770d8678ecc85808857