Malicious PDF — malware analysis report

Static analysis result for SHA-256 2944095c2af30580…

MALICIOUS

PDF

89.8 KB Created: 2021-07-27 10:23:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 02849adde0634d01b34350fd3c66ab63 SHA-1: ade8ec6b5472907b5766b6fb8a5fdaaf205a8902 SHA-256: 2944095c2af3058044c8b02517e66526af86569f7825cdc3437d09c561e1a50c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious content or exploit kits. No scripts were extracted, but the structure and URL patterns are consistent with malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9884

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://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/9e0a4bd1001017b584dcfccc54c6c9ad/23366673905.pdf In PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba88887a0fa---48772804332.pdfIn PDF document text
    • http://reutlinger.pl/userfiles/file/xarazegekaxura.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/a4b4d90f2372f41f284b67ef2a3d4139/tiviretagiponofebukulidex.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609d7890a64c0---wulukunukowazigad.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/luligizegosi.pdfIn PDF document text
    • http://hosungtour.com/FileData/ckfinder/files/20210528_CB8951159694E9DD.pdfIn PDF document text
    • https://ekaplast.site/admin/ckfinder/userfiles/files/69856653110.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/dilal.pdfIn PDF document text
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/89350520764.pdfIn PDF document text
    • http://limitlessillusion.com/wp-content/plugins/super-forms/uploads/php/files/32a3d68946fdf93d450df40ccf225739/bakobamufirimoxofu.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a60203dc39---2779384577.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/dezafujaparogofudafuwew.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/ad48a4f28b35e8ede5cc181738db4d3d/gitinamidikejurupu.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/b5114bdcea53a7427b49f0fac0082567/fivuwip.pdfIn PDF document text
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/53408447747.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/galuleveje.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/fevoxosaweziju.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/cuphiqn2lfd80171v6fif5qigpml9b47/zugekasateberijovovoxodo.pdfIn PDF document text
    • http://lagunarent.lt/ckfinder/userfiles/files/nekefuk.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fcdbf6d554---kojuzegigeripawupisufad.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7bddea2dc4---6613615304.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/fifedutar.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abe34bd45c3---92161937299.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/f915c318092e8862b231a6863db1ca1e/28856306557.pdfIn PDF document text
    • https://datatech-int.com/userfiles/file/nirogidejewedesapos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=excel+spreadsheet+printable+daily+cash+drawer+count+sheetPDF 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_off0000fa26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA26 16808 bytes
SHA-256: 488e3d9e3c3349e67b6c9e36757b1c57f51116b46f834fb13e59d7a519856003
font_01_sfnt_off00012581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12581 11136 bytes
SHA-256: 473f7b79d21d336619e860b8325cf6b1af48f76d9748a53c2c641517d7fd97da
font_02_sfnt_off00013f54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1