Malicious PDF — malware analysis report

Static analysis result for SHA-256 38868e93711c738e…

MALICIOUS

PDF

89.0 KB Created: 2021-07-24 21:06:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e8403a94de9aceca07aedd1143355222 SHA-1: ed054c2355c982d1c69a2982a136f0d96541a29b SHA-256: 38868e93711c738e92ddaaf08c262f671a4a891629dcd384ebbda642c7b78e1a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1566 Phishing

The file is a PDF that impersonates Apple's iCloud service, attempting to lure users into clicking a link to bypass activation. Heuristics indicate this is a credential phishing attempt, and the ML classifier strongly supports this. The embedded URLs point to compromised WordPress sites, likely hosting the phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=icloud+activation+bypass+tool+v1.4+download.
  • 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 http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160ace32b636ea---88894096568.pdf In PDF document text
    • http://files.ibiza-ferien.de/file/78281628033.pdfIn PDF document text
    • https://sanidom.pl/img/file/wesuzowa.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/54549304849.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbc9a5972c---guvasagowozife.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/16097dae2a1971---76203428449.pdfIn PDF document text
    • http://yearbookplus.com/uploads/ckfinder/files/12551686574.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/bu8ajfgl1hkt7e28lc04r6rk03/91673799836.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/50348861008.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/64634445560cd11ad96b8d.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/9c245721463d95ef3d8f845a7bc83235/lumepugafutax.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607545765bed0---razatoke.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/9fe7c483a9c1f9793228c72c5e68a9d5/16082641378.pdfIn PDF document text
    • http://btc-ltd.com/upload/file/96491696045.pdfIn PDF document text
    • http://kbchina.de/upload/vugegotofukevakafikejoku.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608609f5a91d1---56097539836.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/fbcbb2e6eb22d01f5d5274a1e01c59e6/kiponagudasaronowetul.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092c2945b472---57142619363.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/l1s8toodci4e6q8nvb4451960v/8703098776.pdfIn PDF document text
    • https://diaochue.vn/userfiles/file/romaju.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089eaafca6ce---59583281943.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/6vvt06vggs8fuccsr5e7aego2t/tidise.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/files/54591607258.pdfIn PDF document text
    • https://ladangmimpi.com/contents//files/sisofulibobatan.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/egteihj3hc0fefmr7eubirent4/zimek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=icloud+activation+bypass+tool+v1.4+downloadPDF 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_off0000f6de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DE 17104 bytes
SHA-256: 762c0456bd5c9281c109d3daed723debc52a6121f5ecbf514fe7a4c6e795d2b4
font_01_sfnt_off0001233d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1233D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013b54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B54 10928 bytes
SHA-256: b87facc86b562a735408364649e4439e8e2ec5eaeb6fce9dcf50ff294a3aa6bf

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