Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aa2658a21e7c4cf…

MALICIOUS

PDF

67.9 KB Created: 2021-09-05 07:00:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9bf86318ccbd8d1b4f302f18053a64f9 SHA-1: b277f8089b90286bf24d6f51dbe180a802c4ca97 SHA-256: 3aa2658a21e7c4cfb089d0987f371898f807fd68c5246da7429ad8147d592b6e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6872

Heuristics 5

  • 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
  • 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://synerhu.ru/uplcv?utm_term=casio+edifice+eqs+500+user+manual PDF link annotation
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d45da1080---926762994.pdfIn PDF document text
    • https://kraftyz.in/ckfinder/userfiles/files/52876761385.pdfIn PDF document text
    • https://garnet-medical.com/userfiles/files/welinodobeva.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/69302f93282687c8c451972ff6a58f21/67181725004.pdfIn PDF document text
    • https://yensaovinastar.com/media/files/dajitovewopedifa.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b583abfa40---36160451564.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/54732707633.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771fca2b51c---xefajuxuxemeto.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/98276714207.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b595cc56a14---93404625559.pdfIn PDF document text
    • http://tjsyjdq.com/v15/Upload/file/202182857368838.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d201386f55---34741415087.pdfIn PDF document text
    • http://herfon-machinery.com/images/ckfinder/files/20210812175348.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/98830735497.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/78569308593.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/d7fcb2b1d7694c028b74e026d474d525/37947255058.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/06f5525c3d82e7c31773c98fe85287cf/rurajisasunedozitewanevol.pdfIn PDF document text
    • https://samavetpharm.com/userfiles/files/kaxumawojumojabijaw.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/kj314o902k0fdlg2sf9k9ccppf/24295973854.pdfIn PDF document text
    • http://www.mecateengenharia.com.br/ckfinder/userfiles/files/lunisawupatotetafabuxid.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/128781544360c28c2fad59b.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/tegugonutaxerurapabowi.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/42e9cec7eae8fc0c78520c7cd13f711c/muxolezopisi.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE6B 11072 bytes
SHA-256: fd807f14e41ab29982af4d5d59eadc6f845d9ee06efbbd63c8bc8a9697856901
font_01_sfnt_off0000e801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE801 16612 bytes
SHA-256: 6d72cba9e5ffa33fbf2abde72c8a147c7c2a995783c78000976530dc654fc978

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