Malicious PDF — malware analysis report

Static analysis result for SHA-256 74dbe917971272db…

MALICIOUS

PDF

80.5 KB Created: 2021-07-24 23:55:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8e218add96730cad5cd4789b26e212eb SHA-1: 9f7582c0d4e58a050bcc194fd7da37ee705d967d SHA-256: 74dbe917971272dbaef10efa01f5137ed31e0ba587ab6046571c2512900fd28e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous URLs, many of which are hosted on compromised CMS platforms, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a trojan. No scripts were extracted, but the presence of embedded URLs and the overall structure align with common phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/a02d13848d34547e9239dd932d856ac7/42342469721.pdf In PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb64126af62---77844327045.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b8822e7ef---sikok.pdfIn PDF document text
    • http://ohsclassof73.com/clients/9/9a/9a21b0b253f7c4eafe662346d237c286/File/99790763568.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/michcuplqjjtlructq1s1q74l9/90825635579.pdfIn PDF document text
    • https://arhometutor.com/userfiles/file/vimoxogarekoxijorod.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/99193624242.pdfIn PDF document text
    • https://mszukam.pl/dat//file/36644967552.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077baab7aba9---fefikovilevamaf.pdfIn PDF document text
    • http://hublihorse.com/uploads/userfiles/files/83044348337.pdfIn PDF document text
    • http://pappteam.hu/userfiles/file/84745055880.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/76428dc8f4d9338ef08a79b417a35a57/petelu.pdfIn PDF document text
    • http://dnepropress.net/files/file/sinugigetefinijis.pdfIn PDF document text
    • http://worthingtonpark101.com/userimages/58704377054.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/tevafapike.pdfIn PDF document text
    • https://prosaison.fr/userfiles/files/91327178987.pdfIn PDF document text
    • https://gea99.com/ckfinder/userfiles/files/81379034291.pdfIn PDF document text
    • https://coluer.ir/documents/file/70261957210.pdfIn PDF document text
    • https://colakcivi.com/userfiles/file/kotofumuwevasuweden.pdfIn PDF document text
    • http://malbreil.com/userfiles/file/99460755138.pdfIn PDF document text
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/danikiwufogikufejel.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/aef2785dc498251e8e7bcf062d610fa6/16703274411.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/5dli9fvpd5gdqska3hhomkor6s/51668234471.pdfIn PDF document text
    • https://lapakunited.com/contents//files/55091627516.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/lnun2nbv3m0hfrheim20hcf1lt/gonesofuz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=dragon+ball+z+tenkaichi+tag+team+psp+cheats+codesPDF 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_off0000d1d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D1 17356 bytes
SHA-256: 53b7788019f7cf1e91ea35f748e5efd7e95026443888e5373fd43d75844a4cfb
font_01_sfnt_off0000ff98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000117af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117AF 11252 bytes
SHA-256: 55a93673c36dc1403e699dc209500f0518e24047f0ea4bdb0dfc010bb3be0171

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