Malicious PDF — malware analysis report

Static analysis result for SHA-256 195e0e8ab369f620…

MALICIOUS

PDF

87.9 KB Created: 2021-09-07 11:55:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: bdfe3f4c9ee6d1a556ef4379f0dcb508 SHA-1: ed1d9a86b62fa3ecf112472f8471f1b88690ba82 SHA-256: 195e0e8ab369f62065335547c74441ad3a4103ae944ec23eaa5ff26968521bd9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm or phishing lure. The presence of embedded URLs and the PDF structure point towards an attempt to redirect users to malicious content, likely for malware distribution or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • 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.
  • 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://playerpress.com/ckfinder/userfiles/files/11702895717.pdf In PDF document text
    • https://nic-irq.com/userfiles/files/1348906278.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/gedatojorigutatufetikagej.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/aef5ef1e1e899235061de3bed9265e9a/80157037392.pdfIn PDF document text
    • http://pro-group.ru/userfiles/file/49897885646.pdfIn PDF document text
    • http://baihsad.com/userfiles/files/20210712_211648.pdfIn PDF document text
    • http://nuovojob.com/userfiles/files/73373355032.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/6cdd21e3bf14465088a662e07a2c0f04/43979282119.pdfIn PDF document text
    • https://aquatrustfina.com/userfiles/file/41220508022.pdfIn PDF document text
    • http://laihoawedding.com/app/webroot/upload/files/jajefifedazulawagudi.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/c5a4a1f47777d514a8906ae98cb03260/rigumebazutobekudebotikib.pdfIn PDF document text
    • http://anm-av.de/uploads/files/kokepaxerar.pdfIn PDF document text
    • http://yulintimber.cn/d/files/puvifasexowexojovir.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/terujavizedodusixog.pdfIn PDF document text
    • http://mail.teleserviciomalaga.com/ckfinder/userfiles/files/16661630392.pdfIn PDF document text
    • https://psystat.net/candyticket/uploads/page_images/files/31134038404.pdfIn PDF document text
    • https://smartech.lv/sites/smartech/uploads/documents/files/sozumukoketenavomusewetiz.pdfIn PDF document text
    • http://1-cities.com/blog_images/blog_/file/fisudizumotavitedun.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/47760237421.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/d9bc0acf90c626486b66246df87f98a4/98981967135.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607516ca00012---11910268517.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607947ab9ea45---loziganux.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160c28a0428f30---tizetumuturarizurepebepa.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/9440883857.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/5480811d18d1d9f60d503b598eea49a5/jurirafisifogewuzofu.pdfIn PDF document text
    • http://nesthomes.in/userfiles/file/jerowu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=exterior+angle+of+a+triangle+worksheet+docPDF 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_off0000ee2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2C 19484 bytes
SHA-256: da8375a8331acd0100278182c9d790321fa9278e8ed500f3dc546058b855e48b
font_01_sfnt_off0001204e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1204E 11020 bytes
SHA-256: 59d84d05dbe596f637d8c19fb9241162c2cb715d083e685a2d7279749ebaf711
font_02_sfnt_off000139bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1