Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc307a2f06cb24d…

MALICIOUS

PDF

93.5 KB Created: 2021-08-03 16:41:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 006a115fdb5743d3be84dff807bc980b SHA-1: e8e514a178b54315594565d8ebf73ac37e1efc86 SHA-256: ccc307a2f06cb24d42f5606998245630870f60c3dc8affdee71664a3c6d98f60
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The document body is heavily obfuscated and unreadable, preventing a deeper analysis of its specific content, but the presence of compromised CMS upload links is a strong indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099fe694e02c---jaxopelufukemodaravemikod.pdf In PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cea7c94004---99898098104.pdfIn PDF document text
    • http://pulsarvn.com/media/ftp/file/98737631955.pdfIn PDF document text
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/60e00f22fa98bc73d82a76ad11a65d98/xuwafe.pdfIn PDF document text
    • http://prattsofdouds.com/clients/d/d8/d85aab9f4bcbae69c8358f7a9990a0b1/File/larelulijogipofu.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d4055548a---dodelaxopatulevuse.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a95f3528bf6---wawanitepifiju.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/04rmo3f5dm1re74rg4i7qep1he/19661880440.pdfIn PDF document text
    • http://studiocalcinoni.com/userfiles/files/16127561405.pdfIn PDF document text
    • http://ingpiazza.eu/userfiles/files/38277418284.pdfIn PDF document text
    • http://kaies.cn/upfiles/210727195955926889rgh0is.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/nowesadowaromiva.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/bkp93j20351j8bmkkrl76kttbn/62387162469.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/16108a381ec945---safaxujanologawuranoz.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/dudagosojeler.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/46067663b8fc2b6d8629996e85479cc5/wumewepotutikiref.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/f47b8bdcd4c487f745485645fec7a47d/74149828218.pdfIn PDF document text
    • http://hanart21.com/files/userfiles/file/822662477.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/83b8b46ac987b73615c038354f507766/wovipukotibomulefaxav.pdfIn PDF document text
    • http://kokocurry.gm/userfiles/file/zijamezuwurir.pdfIn PDF document text
    • http://kinel-hunter.ru/upfiles/file/61387018954.pdfIn PDF document text
    • https://yukkumpulgroup1.com/contents//files/puvel.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16076cf5479aea---visaxoxawadomezukasuguwol.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/063f296f5732872acb371413cb4fcb55/fugatapobikodumanavufema.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+long+does+cubital+tunnel+surgery+take+to+performPDF 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_off0001085d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001206f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1206F 17096 bytes
SHA-256: 26ba2d79d1474bebd0a79b9844316ae7d5a0ed41f850c00f3760f2b756495976
font_02_sfnt_off00014d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D31 11484 bytes
SHA-256: f8ef07965580d63d846e2a9d96107b08897cb8d8dc66b6ead0922ad052be2a0c