Malicious PDF — malware analysis report

Static analysis result for SHA-256 5973cccf550c0dfb…

MALICIOUS

PDF

101.0 KB Created: 2021-08-06 13:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 393129575793a5ddc2c4c6b93d16b0ae SHA-1: 9c13eae52d21d2e831d23a73a38c1d63f79ea519 SHA-256: 5973cccf550c0dfb7488e289ddd2be1c548b145d442ace6fe2fc7c08d8ffd618
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the structure and URL analysis point to a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://pasarantogeldua.com/contents//files/voxuj.pdf In PDF document text
    • http://status-go.net/gfx/userfiles/files/pokikevejubivafegibatix.pdfIn PDF document text
    • http://spielundlicht.de/content_provider/documents/files/7672159014.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/qm2pu8uqivm777h8d5etbpddmk/lonobeb.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/japowunew.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/kisigawobesevove.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/53079157826.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/gosamiwepila.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160895b6da64c7---jibirutodejewolodezos.pdfIn PDF document text
    • http://web-news.eu/www/pkpar/userfiles/file/42568885847.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16086aa4ee3fac---86677752358.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/paguwalasufoz.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f9210aef47---25708607280.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a0eeb6c9b1---52092986380.pdfIn PDF document text
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/pafelinumorozok.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/72065979443.pdfIn PDF document text
    • http://postelezmasivu-brno.com/ckfinder/userfiles/files/30616811414.pdfIn PDF document text
    • http://kasargod.net/uploads/file/julogez.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a477989fb10---gefufobinuxefujeparev.pdfIn PDF document text
    • http://teknis.it/userfiles/files/suvidodaf.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/2ee2f0424e745f830cd3fd478d9eb373/nofodulugun.pdfIn PDF document text
    • http://www.alfapilates.pl/upload/file/fosatuxajoxugiwexi.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad4e0f7c700---7791350518.pdfIn PDF document text
    • http://www.vikingmaterials.com/img/72938797005.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+give+a+proper+full+body+massagePDF 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_off0001256e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1256E 11232 bytes
SHA-256: 48e0ca0b2300011c83d308fd06d0dfbc6bbccb6a3d6e67345168e59fe85aaac4
font_01_sfnt_off00013f6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F6A 17396 bytes
SHA-256: 8a7f39d8faf0b51b3287e10a0cede2eeccb4b39d3c936482ee4215a12ccdaedf
font_02_sfnt_off00016d48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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