Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa2bfa3eb594c979…

MALICIOUS

PDF

84.7 KB Created: 2021-09-07 21:24:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2f088026d8b18d4c947eb23e8a365d52 SHA-1: 59dca7f85c9e77842e9c71a0d928bb6a52966799 SHA-256: fa2bfa3eb594c97958f8693318b4c21153cae90303841a6d8243410f8c975b27
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users. The presence of these links and the overall structure strongly suggest a phishing or malware distribution campaign.

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://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/8inuc0lp2ukfdevuonfufvht32/mojijatepag.pdf In PDF document text
    • http://parfumerieindex.nl/images/uploads/nilizogaxorabisagove.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/c0d2547dd02ce4694591542607e0cd0c/vumupepeva.pdfIn PDF document text
    • http://daedukgs.com/admin/fckeditor/data/file/20210806134724.pdfIn PDF document text
    • http://frappsreagent.com/upload/files/xedipudobolarodemexawafi.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eab1164817---labato.pdfIn PDF document text
    • http://cheapmarkt.com/userfiles/file/65269850027.pdfIn PDF document text
    • http://orchid-daikanyama.com/userfiles/file/bikafur.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16136973a41eda---kobajababo.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/gukugodovuluver.pdfIn PDF document text
    • http://phutungtdc.com/upload/files/56494818372.pdfIn PDF document text
    • https://g4m3s-4p1-12s1.com/contents/files/kawifudexid.pdfIn PDF document text
    • http://ieeepes-thailand.org/app/webroot/files/files/36727840938.pdfIn PDF document text
    • http://rungruangsteel.com/public/upload/userfiles/files/64160315964.pdfIn PDF document text
    • http://gpp300.fr/userfiles/file/lufanopoziki.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/48f21e2e0173c0f697783a812994b30f/65273513664.pdfIn PDF document text
    • http://15889163.com/ckupload/files/gazojuruvuj.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/3a2896b881ed0b4d07d011bb1709de0a/54626380696.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d252ad2a93---fuputexuselaxef.pdfIn PDF document text
    • https://kolbandibileklik.com/resimler/files/duxoridigomiligaxamonagig.pdfIn PDF document text
    • https://atlanticcompact.org/userfiles/files/mamedemagumugibof.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098a282b6a30---42145311628.pdfIn PDF document text
    • http://anhopphat.com/uploads/files/bivibemaxugedurozedamiwa.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/99746280375.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+combine+2+jpg+files+into+one+pdf+onlinePDF 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_off0000e55f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE55F 11168 bytes
SHA-256: 7491eb8372cea8b271295c5e416cb032d960d0bae6e324fffa7b0d524dff74a1
font_01_sfnt_off0000ff0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0A 17388 bytes
SHA-256: 72d5c90d8af7b97f44152ab043249d21d40b8e9e429ab3813e2b1eb309a2f9bf
font_02_sfnt_off00012c99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1