Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a47918dfd2ef2de…

MALICIOUS

PDF

104.0 KB Created: 2021-06-30 21:27:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 200c80ee304104fe00ed4b0d87163687 SHA-1: 68bc01e2ca36b14abcb5f779368bdb0506c00852 SHA-256: 2a47918dfd2ef2dead55a9d70631c4d37d0eb7dc8fc6c0cbbbf66f5b526e1cd5
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as a malicious PDF phishing trojan by ClamAV. Heuristics indicate it functions as a link farm and a callback phishing lure, directing users to potentially malicious URLs and prompting them to call a phone number. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to exploit user trust for financial gain or credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

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 https://itacademyindia.com/ckfinder/userfiles/files/fesoja.pdf In PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/d2e2af79cde27d5931425259db29dcd6/finevabe.pdfIn PDF document text
    • https://hr-serdahel.hu/images/file/vefosisegugivusexowixo.pdfIn PDF document text
    • http://londonjip.com/userData/board/file/wezuravuvogosowonu.pdfIn PDF document text
    • https://petala.gr/userfiles/file/jisaguroranubakadu.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b252ddc173---wamenamimatudefumenos.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608289d53831c---guluxapizadusa.pdfIn PDF document text
    • http://chroscina.com/userfiles/file/zabafaremo.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/guzumodifelokixenolil.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/69195611057.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021062911485731.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/vemojonele.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a1cbcbdc704---14085517828.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/zokajifeni.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c66657a78fc---44234626565.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871a346e0db---97445248248.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/3ruee8fgnk5i1sql5d6pbdhbj6/94807319610.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160881da9629d5---wibepefetenufadibamunezu.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff222231de---kiwepazoj.pdfIn PDF document text
    • https://bnovum.hu/downloads/pewulixegokififow.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/n7o2948gk0qkg2gvfnspn0auu5/91116141450.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/80741209867.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/kopb3a3cqm6a0l5m29c1fjiv33/67364353519.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=fours+cash+and+carryPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000112da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112DA 19260 bytes
SHA-256: 5af508102d5265c37c0f1a4f7b6ec24d7b7cfc4bd95cff4cef2601f54e397b81
font_01_sfnt_off00014676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14676 18272 bytes
SHA-256: 57b2a58a4c39482256c4cbe3712b33ebe49ce187651ee3aaa0385ac7f2987fca
font_02_sfnt_off00016353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16353 10288 bytes
SHA-256: 65782d7848445f3151a128794e7d6512ab422e112c5f2b247658aad647964cec
font_03_sfnt_off00017a6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A6D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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