Malicious PDF — malware analysis report

Static analysis result for SHA-256 95e686339353b2c2…

MALICIOUS

PDF

84.5 KB Created: 2021-09-17 06:17:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d7600e5576f635628e8a73855333ad5f SHA-1: 9070eb5d3497b9bd531e91a8f89268edacb0f075 SHA-256: 95e686339353b2c2b05965e34261882ba0b9bbce0048786e0fd86952a3f71e73
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://tuclubcr.com/campannas/file/lobaxapabadevudega.pdf In PDF document text
    • https://anandamsanyal.com/userfiles/file/28885668766.pdfIn PDF document text
    • http://alfatreyd-mebel.ru/archive/images/file/paxojizewaxiwowafazupor.pdfIn PDF document text
    • https://xaydungdonggia.com/app/webroot/files/images/pages/files/wudobusolapufegolu.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142d665c0fb8---redaleduxikujaduvijira.pdfIn PDF document text
    • https://www.elshandmadedesign.nl/ckfinder/userfiles/files/sulefolevepi.pdfIn PDF document text
    • http://eskuvoiiranytu.hu/blog/file/dolorezarotojekoz.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/00797899fda9843545b598a35016b57e/88618939673.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/1360467306.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/pukurodixepenatod.pdfIn PDF document text
    • http://pdww.ru/ckfinder/userfiles/files/32914542651.pdfIn PDF document text
    • http://husplaza.hu/editor_up/33911753146.pdfIn PDF document text
    • http://tourgrodno.by/images/content/file/vavepifajesuk.pdfIn PDF document text
    • https://ooo-kenk.ru/userfiles/file/38615221418.pdfIn PDF document text
    • https://cmf8.ir/data/file/gepir.pdfIn PDF document text
    • https://gastriklandsbf.se/UserFiles/files/45507942605.pdfIn PDF document text
    • https://livresdarts.com/ckfinder/userfiles/files/449194186.pdfIn PDF document text
    • http://www.rsvpcatering-ar.com/files/imagesfile/17819031587.pdfIn PDF document text
    • http://mvsexpo.ru/admin/ckfinder/userfiles/files/92972469305.pdfIn PDF document text
    • https://askisan.com/upload/ckfinder/files/62610581925.pdfIn PDF document text
    • https://pinyardim.com/calisma2/files/uploads/42267488435.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/78786432963.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=apple+itunes+for+android+phonesPDF 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_off0000e56f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56F 17872 bytes
SHA-256: c5fa0fde2add77a1f2f49456703117eff0a05426d31660d6e798f626ebe15cbc
font_01_sfnt_off0001144f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1144F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C66 10676 bytes
SHA-256: 375cf67d35b4c37f294c8cba86a2c5a3cd140828fd3063df6584ab84ccdf9dde

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