Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fee73d84ade1c1c…

MALICIOUS

PDF

86.3 KB Created: 2021-07-30 01:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 17e4557e7ccf8ae9655cb564283a0821 SHA-1: c4a7012f4bb3e4f9a7d896e8674817f653100575 SHA-256: 0fee73d84ade1c1c36ce8d869f6bec87f868eef64018751a6c2563e0274de9ad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, indicate a link farm designed to redirect users to malicious content. The presence of a link farm suggests an attempt to distribute phishing lures or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://alconburyreunion.com/clients/36523/File/wofekuwe.pdf In PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe4020b2f1---989675985.pdfIn PDF document text
    • http://www.macrolepidoptera.hu/userfiles/files/fudizefetowuxegup.pdfIn PDF document text
    • https://tonwen.org/userfiles/file/12000939588.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/eh9323otsvpfvfob6q8tg5pi8h/20967414277.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071f61498ec7---nedafewoduzazobo.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b499785c402---xorugefofegaremofora.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/712b5972a01eb93f6638f1807d53b06a/22946624271.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/2bf7c27e1e8e12a1e33a560ab5643fd1/tetudubusu.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160743fd9277dd---rafejobifekivunarib.pdfIn PDF document text
    • http://ventima.ru/userfiles/file/gokamedij.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/mekejatuvawovev.pdfIn PDF document text
    • http://almawred-sy.com/files/adminfiles/files/68043944765.pdfIn PDF document text
    • https://simon-daulte.com/ckfinder/userfiles/files/feromuwigi.pdfIn PDF document text
    • http://premium-h.info/files/files/67810559502.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/191e04e64cd3ac7d3a5fffedeb98d0f8/kofedolesaturad.pdfIn PDF document text
    • http://ladyqueen.it/userfiles/files/xogojifawunopupop.pdfIn PDF document text
    • https://bruceautoservice.com/files/file/2389441313.pdfIn PDF document text
    • http://zonweringbelgie.com/ckfinder/userfiles/files/54418480651.pdfIn PDF document text
    • https://www.saammohaseb.ir/wp-content/plugins/super-forms/uploads/php/files/0e2a15edcef830abd1237c697e8f7d18/51389064876.pdfIn PDF document text
    • https://soechi.id/userfiles/file/88807858355.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/98962587435.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce3ba22589---jewonunotejelobebi.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16093f7a5a27ad---buwenujapofawaluf.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/c11d3b0cc7403c60a3bd99695ad36843/pidetoronipogoruv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+get+stock+ageing+report+in+sapPDF 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_off0000f0e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000108f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F9 10672 bytes
SHA-256: 287da0d63f2038d45ebf1081f6edfcbb028160cf79ef9b8b0340cc2031d4742d
font_02_sfnt_off0001219f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1219F 16316 bytes
SHA-256: 92d9ed58fe83cd87d9f5ffdc236f3521488d92e6dc35e810191dd451f4c0c6b6