Malicious PDF — malware analysis report

Static analysis result for SHA-256 707ff993c50ae2ad…

MALICIOUS

PDF

91.8 KB Created: 2021-09-18 07:19:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2bedc2cd8ad0bfe761e6d0ff1a099259 SHA-1: 87c2e59443f515cc5735edb3177c64cd132356c7 SHA-256: 707ff993c50ae2ad3cf594ac4ad280a56799b013f07b8688781d176c90dd85bb
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file was detected as malicious by ML classifiers and ClamAV. Heuristics indicate it employs social engineering tactics, specifically a lure to install browser extensions or updates and a fake payment redirection scheme. The document body is heavily obfuscated, preventing a detailed analysis of its direct content, but the heuristics strongly suggest a phishing or malware delivery attempt. Numerous URLs were extracted, many pointing to potentially compromised websites or disposable hosting, indicating a broad distribution effort.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://e-midas.ro/files/file/rebugolujebeb.pdf In PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145084ab8dac---wanufevanejapi.pdfIn PDF document text
    • http://aquaclub.hu/userfiles/file/63627813498.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141b541ef32b---7896599363.pdfIn PDF document text
    • http://hotel-ambassador-nice.com/upload/files/wezok.pdfIn PDF document text
    • http://dges.in/userfiles/file/10236324944.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16143a9898bbc1---48282065137.pdfIn PDF document text
    • https://dgssu.com/upfolder/e/files/20210904025440.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/xepawegovuf.pdfIn PDF document text
    • https://www.akilciilacdernegi.com/ckfinder/userfiles/files/41028518494.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d5fa5c052b---17428221801.pdfIn PDF document text
    • https://www.baust.edu.bd/app/webroot/ckfinder/userfiles/files/34205299741.pdfIn PDF document text
    • http://songpinhao.com/userfiles/files/11797799816.pdfIn PDF document text
    • https://needlugs.com/userfiles/files/batosamidut.pdfIn PDF document text
    • https://fajndoktor.cz/images/file/files/31201181414.pdfIn PDF document text
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/14008928835.pdfIn PDF document text
    • http://elite-nails.pl/Upload/file/jarilaguvemomavilomobo.pdfIn PDF document text
    • http://vouchertiket.com/airplane/ckeditor/uploads/files/42581660341.pdfIn PDF document text
    • http://hattingtoemrerogsnedker.dk/userfiles/file/64334321929.pdfIn PDF document text
    • http://xn--80aafbanafwvcftiqfecrg2a.xn--p1ai/pict/file/11643976170.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1614473d3753ef---56961737446.pdfIn PDF document text
    • http://ddservice-bmw.pl/userfiles/file/29366195543.pdfIn PDF document text
    • https://fultoys.com/userfiles/nokoxuxowodowebejafitoro.pdfIn PDF document text
    • https://mldom.xyz/web/img/podborky/files/zubobofolonirij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=transfer+service+from+android+to+iphonePDF 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_off0000fe46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE46 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001165d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1165D 10868 bytes
SHA-256: 5ec726ff68038cf05c1962e09ff687240960bdfb25e10681f2a9760ffdfc8187
font_02_sfnt_off00012f55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F55 19308 bytes
SHA-256: 95e1c154c06698d9e418f7c7bd96c4f111f20ccf410091fdbe1eb9cf2b592ad7

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