Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9f2f190fe958264…

MALICIOUS

PDF

86.6 KB Created: 2021-07-03 14:58:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 22bd53c435b25392ee75bfd860cea081 SHA-1: 5b59fcd3c3f13ca2275a8eda4ce6000201fb6ab2 SHA-256: e9f2f190fe9582647a84e8fcba04d0a0541d4eedfd345de2133f99791ca2368e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm. The primary goal appears to be directing users to malicious or phishing content hosted on these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/c34b62de220a792379b40b8500ab944d/gagonibalinexivedimeri.pdf In PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/julovupujomiditumuzunira.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/2cd8a28076c598d97c012ec573f7355b/89314685818.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/71201979884.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b21b1da12f4---baxobuse.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d39d651c5f8---kepegip.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608af5388a0d4---fematidikaf.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075bdaa1dc9a---silikalosimugumu.pdfIn PDF document text
    • http://insidethedigitaltrend.biz/userfiles/file/safud.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b5bc1b707db---36194203628.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/r1eql8mj2j5a5r6roesj6vhqqa/taletewawedipi.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021043005585473499.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097344fcb5cb---jolil.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/2021620025158750.pdfIn PDF document text
    • http://mientrungpetrohotel.com/users/files/50402964504.pdfIn PDF document text
    • http://drjoecarver.com/clients/49355/File/wodoweleroravuzogawuvesap.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b4b9989fbaa---fudanebudidutukolomurawuv.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a7d6e54be8---dajana.pdfIn PDF document text
    • http://master-sign.ru/ckfinder/userfiles/files/miwobebitutabavurute.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/6fce606c5ed3e1707f034fe6f3af8c5b/zozapafabokel.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/k78evi8t5def2uqf3blqt433vh/mokuv.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/275199707247cd2d1a72e3773dfa16d4/nexaluzokawefovebesuruxiz.pdfIn PDF document text
    • http://nitexprofi.cz/userfiles/file/lotokanipo.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/sonowajaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=wow+classic+heavy+mageweave+bandage+trainerPDF 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_off0000effa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFA 16660 bytes
SHA-256: c70c5afcf756489608d03c0dc23bdc51b89a02546f7ec08fae2af24af5bf227d
font_01_sfnt_off00011aa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA6 11216 bytes
SHA-256: 16dcfbcc32fc7ff4d34969ff350a48dd9a7be86d3494a27de0fce29ebccb3a5a
font_02_sfnt_off00013496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13496 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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