Malicious PDF — malware analysis report

Static analysis result for SHA-256 18d70ab21c64eb0e…

MALICIOUS

PDF

541.8 KB Created: 2021-07-14 02:11:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 33981f4390435534bda52d155fdefa5d SHA-1: e4d8523e7f6a304bf75400bd9285573dfeca0ac1 SHA-256: 18d70ab21c64eb0edd55904cb6be9f2853dc4fd5014ba17229e79d86d40a6643
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and heuristics indicate it is an advance-fee scam lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to trick users into visiting malicious sites or downloading further payloads, likely through a social engineering pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8262

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • 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://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/e33b0a9bf6c3244b81ce1b63ad3b6cf5/61660614890.pdf In PDF document text
    • https://samowar.me/userfiles/files/tisibapigu.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/bofedibowofozave.pdfIn PDF document text
    • https://magiccat.pro/ckfinder/userfiles/files/18015138302.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa3868c26a---84663991171.pdfIn PDF document text
    • https://blokhol.com/upload/files/16974984900.pdfIn PDF document text
    • https://rmp-traueranzeigen.de/cms/files/bowenakegagunal.pdfIn PDF document text
    • http://energy-labels.com/userfiles/file/32135981241.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087ba00d76dc---75324339880.pdfIn PDF document text
    • http://bestbelly.org/content/files/files/46663591661.pdfIn PDF document text
    • https://medtek.vn/storage/file/89719911160.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/lajazul.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/c63cf9683cc1c5d8c7371d139de0e070/12299702833.pdfIn PDF document text
    • https://jooli.ru/ckfinder/userfiles/files/foxijojadok.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/ac0f7d187d02f5d935827845b56876ae/29100879012.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/61e25e314ac04165894dfd8bcc1a3f17/60275095862.pdfIn PDF document text
    • https://estoniapools.com/contents//files/tuvikexidaredo.pdfIn PDF document text
    • http://musikpark-live.de/userfiles/file/nagotopidomom.pdfIn PDF document text
    • http://quick-thailand.com/images/uploads/file/xopipivu.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b2635a24e47---porowinudidukagazaki.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/31601684367.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=exploring+creation+with+physical+science+module+10+study+guide+answersPDF 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_off00080173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80173 11520 bytes
SHA-256: f008b131b7243c473751ba63103903bb65ebb80e509c994dcdd1736cf395531a
font_01_sfnt_off00081c7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81C7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0008348f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8348F 19276 bytes
SHA-256: 18a2b7cc6cec2768c7a58f5b0f38775fe8644e79f6677b0706ad27141f16461f