Malicious PDF — malware analysis report

Static analysis result for SHA-256 7af83d25d253834f…

MALICIOUS

PDF

96.9 KB Created: 2021-08-07 15:37:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 07e70d30cc7373902da1008e207b00a9 SHA-1: 8a1d2d593d1492edd3a18aa261e27a243e9fc3e0 SHA-256: 7af83d25d253834f3060c857ae50099788880c1273d1e9fc5e8873dca4d0b656
244 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains multiple lures, including a payment redirection scam and a browser extension installation lure, suggesting it aims to trick users into financial loss or installing further malware. The document also includes external URIs that point to compromised CMS uploads and link farms, indicating a potential distribution mechanism for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://www.videocopilot.net/assets/public/ckfinder/userfiles/files/zikinanavokozerofukixi.pdf In PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b075f3797---28429883285.pdfIn PDF document text
    • http://netshopnepal.com/userfiles/file/82741837653.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/4a74b2b1b1c9df1d375772cfda2ab0a3/kejut.pdfIn PDF document text
    • https://talaa-obour.com/webmisr/uploadwebmisr/file/bametezesafoxuzov.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/a13fe9cbfe1b0cb7755dbdf393c0c97a/zopiruwugimisoromil.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c245c690486---giseji.pdfIn PDF document text
    • http://gustosandvic.com/ckfinder/userfiles/files/jimawaxorugedukubanu.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/hh33a4hn53mgbgnns8h5eum4fh/93835057017.pdfIn PDF document text
    • http://plnjl.com/userfiles/files/78569388382.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/vupisalofa.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc87655fe0---wilowaxibitovisedopam.pdfIn PDF document text
    • http://446888.top/userfiles/file/tupizuziminip.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/eb5f37b09bb146d954617e923611f9e8/10927993317.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/ndmcs7cimkm5bas0qtbgcc6sm4/losesusokoro.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a433d6a2925---gibuwefomegowelenin.pdfIn PDF document text
    • http://cngwalk.com/fckeditor/userfiles/image/47210708449.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160804fa4e32e4---jenuxadibonir.pdfIn PDF document text
    • https://dermatologie-francophone.com/userfiles/file/tupovumevemokisalunez.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef70f50b3d---15421895479.pdfIn PDF document text
    • http://didongsinhvien.com/upload/files/82328906359.pdfIn PDF document text
    • http://career-id.org/ckfinder/userfiles/files/biboxixuzu.pdfIn PDF document text
    • http://xn--80aagkbrca3apkgkee0a1bi.xn--p1ai/ckfinder/userfiles/files/46917674762.pdfIn PDF document text
    • https://doublehair.center/upload/ckfinder/files/85612528668.pdfIn PDF document text
    • http://lamekatus.ee/uploads/ckeditor/files/josereke.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=how+to+fake+send+someone+money+on+cash+appPDF 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_off00011865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11865 17032 bytes
SHA-256: c3289f5ecb575ff6977a6d9e4313f67c1d86dd7f0510396d7c6000db215b9a27
font_01_sfnt_off000144c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015cd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CD8 10932 bytes
SHA-256: 5337696d14d90a63d6b71737794d8a50d8997e3996e775e0e86bd7820d7e5bb1

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