Malicious PDF — malware analysis report

Static analysis result for SHA-256 176e4276ae73ce4f…

MALICIOUS

PDF

84.4 KB Created: 2021-09-07 21:08:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fc44c9df8bbb85f049a5d8d91de62d4a SHA-1: 2e9e6b92818af22f0ac7788edf216eea133a7a0e SHA-256: 176e4276ae73ce4f652dc94bfbc4658455ff06e62de85bf5f4ab6be9a1894e69
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://laborke.ru/uplcv?utm_term=oreck+xl+user+manual PDF link annotation
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/08329899ad1856f424b098d392303a12/xasisupibajisojop.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/mc2haig3bieolt4daapk0h2i72/82459837143.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608510e281225---tadajonoxujimi.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ad6691fb9---77147173575.pdfIn PDF document text
    • https://shevtsov-art.com/uploads/files/kozetepamivexuzuzimipebe.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b77ce02d001---15383003940.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16128c7a46b92e---wunubevuzogonaxa.pdfIn PDF document text
    • http://papaicountrylodge-longstay.com/user_img/files/babulolaf.pdfIn PDF document text
    • http://eksan-ltd.com/userfiles/file/21900330678.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160799c2109ec3---79820731290.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/f2e0dd343c1a958b99f294edf97f75f9/wiliranorakudobisaro.pdfIn PDF document text
    • http://b-solutions.net/userfiles/file/63463221094.pdfIn PDF document text
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/4cc4c74e25a379133f700b6dd09f8b2e/pitevilapafowew.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/16339533481.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160749972d0b46---54149019649.pdfIn PDF document text
    • https://braus.uz/images/shared/file/42234966942.pdfIn PDF document text
    • https://wsbtitan.com/images/file/22565765226.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/73111718524.pdfIn PDF document text
    • http://www.mab-solutions.fr/upload/file/3916001269.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607b53f17a6b2---84097984697.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/b5aade52233e9cf9a1eef1d692040327/tamirifanit.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16120c7108502b---malofutawojiluranapu.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/kunexu.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16075bf3354ef0---27491833838.pdfIn PDF document text
    • 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_off0000e61a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61A 10400 bytes
SHA-256: 74cb0c10acd7fffe7ea19af21df4fb04d52b9942d93f35820b6c31edf5d35f01
font_01_sfnt_off0000fdb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB5 17888 bytes
SHA-256: 4fb8da1b0cdfb9c3c0147962dc64a8ce2ac661fc9fe9b3daf49c127ab7789bd2
font_02_sfnt_off00012c54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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