Malicious PDF — malware analysis report

Static analysis result for SHA-256 f569d679ce63c313…

MALICIOUS

PDF

89.5 KB Created: 2021-08-25 13:45:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 5ee71f66d507e83e48b5356088e556ac SHA-1: 44bcfbbc1c1d5fc9835402f3cb651d3134760c3f SHA-256: f569d679ce63c31319017125c593d06bb8ab2f78ebb162c91fe3c2c1ed438dd1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The PDF structure and embedded links are consistent with phishing or SEO manipulation tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://winfielddeli.com/ckfinder/userfiles/files/38164407971.pdf In PDF document text
    • http://pantryscan.com/123cars/imagefck/file/wavuzuxibebepelikamad.pdfIn PDF document text
    • http://harrisonfamilyreunion.org/clients/868801/File/78060485829.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/gejepimezexakototad.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/6f5bee8819dd9a1f249316c477aaf2c3/vixixawoxaderafatami.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160ff4193237c2---xepugujijobipixuvebifewi.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/wuritinikuxogukusitake.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f98158a712---zudemonunulama.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/10291922785.pdfIn PDF document text
    • http://aytekinpolatel.com/image/files/fodibavorufikiwomogotudaz.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160e574e340715---pirazuvagoto.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607258616126a---56664098516.pdfIn PDF document text
    • https://bandotrading.it/uploads/file/35163936023.pdfIn PDF document text
    • http://svx.su/ffile/file/vulunopasa.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/58df2740b51a8f5f7e473652ec08060b/7684758475.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a400ea73d19---63189322335.pdfIn PDF document text
    • http://bukvoznaika.ru/ckfinder/userfiles/files/jurimeropuvapi.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/fixokuxenixugolitiwulisex.pdfIn PDF document text
    • http://yomamasushitogo.com/uploads/files/59275961429.pdfIn PDF document text
    • https://wasael.com/userfiles/file/55844321930.pdfIn PDF document text
    • https://bonafideonline.com.ar/wp-content/plugins/super-forms/uploads/php/files/52943a37c9b6bc9db15fbdf6a248bbe5/9281355594.pdfIn PDF document text
    • http://takeacode.eu/user/d41d8cd98f00b204e9800998ecf8427e/file/57570830423.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/i69aia3orpts9jm43lk4vq5lae/24130900748.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b006481529---67435622838.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=promoting+health+and+wellbeingPDF 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_off0000fca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000114b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B7 16648 bytes
SHA-256: 6ce456d1b22e93af6a0b577b2cc7b4580ff23e50ae8de57ee5be61bf47af5fce
font_02_sfnt_off00013fcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FCF 10752 bytes
SHA-256: f133d42f71e32c62fceb0fe8ef7bc174bacd58ec9b5178cb9f1b78f1d3975b2c

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