Malicious PDF — malware analysis report

Static analysis result for SHA-256 32e97a2cfb80d369…

MALICIOUS

PDF

77.5 KB Created: 2021-09-30 23:11:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 223757ef12cdd35532fc6210ae1db4e3 SHA-1: a4a88ff7535d382fce7fa59d7b3b8d247f4dcb8e SHA-256: 32e97a2cfb80d3699f5837a7f1345a3ba0869e348b01d6136d20a7a02d6c80e8
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to potentially compromised websites and uses a lure related to downloading software, indicating a phishing or malware distribution attempt. The presence of a 'callback phishing phone lure' heuristic further supports a social engineering attack. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • 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://coretry.ru/uplcv?utm_term=descargar+whatsapp+gratis+para+pc+windows+8+en+espa%C3%B1ol PDF link annotation
    • http://bsa-billiard.by/images_from_html_editor/file/39363692926.pdfIn PDF document text
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/remugitaz.pdfIn PDF document text
    • http://cu-mbc.com/ckfinder/userfiles/files/jedikar.pdfIn PDF document text
    • https://forexinc.ca/upload/editor/file/28784993863.pdfIn PDF document text
    • http://aqs-group.it/userfiles/files/nezulezod.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/5273bc6ea47b47a44541806a745aa377/golavofi.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16151ece93aaee---sodetaboziwepanuwifadanep.pdfIn PDF document text
    • http://avandcie-automation.com/ckfinder/userfiles/files/wukaragiso.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/litixo.pdfIn PDF document text
    • http://elosc.com/upFile/file///ITX202109271657596744.pdfIn PDF document text
    • https://jv-cms.crazy-jessie.nl/uploads/files/14575908254.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/161335d73e5be4---30389797932.pdfIn PDF document text
    • https://olboihorgaszto.hu/editor_up2/69339505000.pdfIn PDF document text
    • http://felixefontesadvogados.com.br/ckfinder/userfiles/files/metifosunu.pdfIn PDF document text
    • https://toptenstudy.com/upload/files/BodyFile__6141F2E3ECA26.pdfIn PDF document text
    • http://ourdesign.hk/ckfinder/userfiles/files/48635684562.pdfIn PDF document text
    • http://kvbm.org/pds/userfiles/files/56854451939.pdfIn PDF document text
    • http://karpatskiles.ru/store/file/rekujabipet.pdfIn PDF document text
    • https://filetorme.com/upload/files/1773184817.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/44732639979.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/33004047885.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/xibuz.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/c76594a67bd5a1600b92604f0b27f89e/37610740793.pdfIn PDF document text
    • http://xn--80aafmoni2biho.xn--p1ai/admin/ckfinder/userfiles/files/59445942685.pdfIn PDF document text
    • http://djpress.pl/Image/files/55153341499.pdfIn PDF document text
    • 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_off0000c0fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0FE 19144 bytes
SHA-256: 550cf98095d4522278770c77acaa4d28068c5a89b233729338d0b977a295afb8
font_01_sfnt_off0000f2ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD1 11296 bytes
SHA-256: 1b53600797b78a257317757756a8508a4ed9456dba69c848fbef37de353f23c5

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