Malicious PDF — malware analysis report

Static analysis result for SHA-256 b32719ee1f351c89…

MALICIOUS

PDF

87.1 KB Created: 2021-09-12 01:46:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 008fb6dbaa3f8b1eb0551af5f792cc32 SHA-1: c241057a08bec43519d9d9cf832050a49403569c SHA-256: b32719ee1f351c891675bce76dc7793c2aa28bfb973e25b1dcf79a69827b8bf5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://alshaabcoop.com/userfiles/file/genidipov.pdf In PDF document text
    • http://naturestuff.nl/siteimages/file/jofem.pdfIn PDF document text
    • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/77515166037.pdfIn PDF document text
    • http://hotelgiottotorino.com/userfiles/files/pubatiw.pdfIn PDF document text
    • http://ferrocom-spb.ru/userfiles/files/fesamajedosap.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/c072272fbbe7973fce34c070c00d63bc/6626534909.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/40226367270.pdfIn PDF document text
    • http://www.gpkoaee.ru/ckfinder/userfiles/files/lukijomobetexubasabozun.pdfIn PDF document text
    • http://trust-law-firm.com/userfiles/file/20210912062021_1083561575.pdfIn PDF document text
    • https://benhgout.net/uploads/Files/file/34846921282.pdfIn PDF document text
    • http://suliaok.com/v15/Upload/file/202193354311090.pdfIn PDF document text
    • http://www.egavilanes.com/ckfinder/userfiles/files/buvapavofepiw.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613066fd9ec37---zunikewogeto.pdfIn PDF document text
    • http://akconta.com/uploads/files/jedewebugepika.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16137f4beda16b---91869206700.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/towarimulivujenakurusimu.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161328b1139706---33446228917.pdfIn PDF document text
    • https://foodvellythailand.com/upload/files/joxaduvuxumewuli.pdfIn PDF document text
    • http://fertilityupdates.com/userfiles/files/guzewezam.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16134f57287904---janokusexujamadim.pdfIn PDF document text
    • http://goopenapp.com/uploads/files/gololexelufuzu.pdfIn PDF document text
    • https://hiroyoung.com/data/files/sededizakinanusufimu.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16137485e4d67e---mesotajivugo.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136a79c6a560---6248685539.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=faire+conjugation+frenchPDF 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_off0000ec5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10471 19456 bytes
SHA-256: 85c6a57541773287a8dc63c043ec80faf8ff61a32adad0f814ecbf8468a25b46
font_02_sfnt_off000136c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136C9 10608 bytes
SHA-256: 428dea409f6c4f723dba88972c3996f07003a592654680e7d3c7e17e5dc94601

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