Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9849a9bf3577296…

MALICIOUS

PDF

83.4 KB Created: 2021-09-06 18:26:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 27a58468d27cd76951a4ca3d13166476 SHA-1: 0cdecacf8e5dac3e06a63e35703dd598a2147d9b SHA-256: a9849a9bf3577296c891721f8093799b404888d2044b93d5761bf38e95f87d4a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to host malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec115b9377---weladazor.pdf In PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6dd8194637---16484001158.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/rujojiboboxabeg.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/8d3535babef14f97969d72cccbfbe4e3/xuziromejizasozinajitak.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070012094e6b---mukurikikosufalewanode.pdfIn PDF document text
    • http://princeverma.in/uploads/files/mudejezipila.pdfIn PDF document text
    • http://baobiachau.com/luutru/files/98734193911.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/98854039882.pdfIn PDF document text
    • http://verypool.cn/images/upload/File/migadarusiwasizeriva.pdfIn PDF document text
    • http://strojsteel.cz/webpagebuilder/ckfinder/userfiles/files/55360610355.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/83c6e3b8f677753c65db70f07563c2b7/firororilakotonezu.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/b6becc4f5157e13752bfc60259de8a28/36895405687.pdfIn PDF document text
    • https://vieclamday.com/userfiles/file/96617911965.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef904e1946---tadoxolevedejavel.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/xixejorolupobezifukatopaz.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/4e742a4980275d752bcdb1989e76ade5/kiritisotexogagujare.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7dc8b14a7e---49354513590.pdfIn PDF document text
    • http://hilltop1976.com/clients/24685/File/kowon.pdfIn PDF document text
    • https://buyafranchise.org/files/files/81376027114.pdfIn PDF document text
    • https://mr-alian.com/upload/ckfinder/files/33528452577.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=malayalam+stories+to+read+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD823 21796 bytes
SHA-256: 990b6089e50d8afaf54af617627b6d90a76b8e15cd0fd504363874e7692207c0
font_01_sfnt_off00011009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11009 10664 bytes
SHA-256: abca50b8c92cd7270fcb50133148f737c8433e959cc74d96e3ab71f5c692ed31
font_02_sfnt_off00012887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12887 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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