Malicious PDF — malware analysis report

Static analysis result for SHA-256 477f6844985d9f61…

MALICIOUS

PDF

80.1 KB Created: 2021-09-15 15:08:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4ace20e526092c41a0257483a2655d46 SHA-1: 6d67dad79c13a0fb78742c35bcbc77b546113433 SHA-256: 477f6844985d9f6124c439b2a94939f541731a9d5c5c5860925a2844b19b58e9
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan. The presence of numerous external URIs, many pointing to compromised CMS uploads and link farms, suggests a phishing or scam attempt. The 'SE_CALLBACK_LURE' heuristic specifically indicates the document is designed to trick users into calling a phone number, consistent with tech-support scams or refund/billing fraud lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://topnotchimports.com/ckfinder/userfiles/files/49743801735.pdf In PDF document text
    • http://kuwaited.com/cote_dor_import/admin/ckfinder/userfiles/files/texikusibasejaboki.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/bef614b06f400b305a66f0b50aaab3b9/zozameboriwixofewefaxot.pdfIn PDF document text
    • http://acudrved.com/ckfinder/userfiles/files/rosekebotozedededukutuk.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613ffc1e547ed---22828471742.pdfIn PDF document text
    • http://mos-craciun-inchiriere.ro/fckfiles/file/7310268371.pdfIn PDF document text
    • http://ros-grad.ru/fck_editor_files/files/51652800536.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/5fhp2vs3eks9fmr5cp35k2587v/39785226663.pdfIn PDF document text
    • https://mintedimages.com/ckfinder/userfiles/files/92970285462.pdfIn PDF document text
    • http://araonline.hu/uploads/file/letarupupoxugimofukapizit.pdfIn PDF document text
    • http://fiumaradelsossio.it/userfiles/files/23999936161.pdfIn PDF document text
    • http://konemara.hu/userfiles/file/3107743081.pdfIn PDF document text
    • https://rwd1.thadv.com/upload/files/82201836179.pdfIn PDF document text
    • http://qianshunqs.com/admin/upload/bitanuravemuvenison.pdfIn PDF document text
    • https://drlalashow.com/php/billboard/uploads/file/pagewiwu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161309465ddaaa---pubotelotazi.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/130915fde6932ec87a13f92f7efa5e37/25138502949.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613efe290af22---zuvoxif.pdfIn PDF document text
    • http://fli.edu.mn/ckfinder/userfiles/files/49064944564.pdfIn PDF document text
    • https://nilsahost.com/calisma2/files/uploads/sadelewabupopumusitudawar.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/a7ccfc4ab2c41a7d9241fb3545007f9c/25272240107.pdfIn PDF document text
    • https://charming-dc.com/uploads/files/202109150617315281.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/goruduxiwagiputaxu.pdfIn PDF document text
    • https://samirkumarpaul.com/ckfinder/userfiles/files/38237050471.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/15289560115.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/36753217126.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=minecraft+pe+1.8+apkPDF 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_off0000d52c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD52C 10552 bytes
SHA-256: f7a14ff04c0a9007381a6451a1be771854032e643716f175f804214f6a16e916
font_01_sfnt_off0000ed69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED69 17396 bytes
SHA-256: afaf3c96932a62b166216e3e0b1c4111175a5df570c9d49fd232a8e517b18aa7
font_02_sfnt_off00011ae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1