Malicious PDF — malware analysis report

Static analysis result for SHA-256 1edd76ecdcd4abfc…

MALICIOUS

PDF

76.2 KB Created: 2021-09-01 19:27:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5644e337400ae9e67c3d2315d1e8e539 SHA-1: cdad1645431ca177ed2dbdd22bcf151c8da6bb84 SHA-256: 1edd76ecdcd4abfc81706420837f629e0955f8506d66736a4b6873dd119475b1
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress sites, a common tactic for distributing malicious payloads. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to download a password-protected archive, a method used to bypass gateway security. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/d3mov7oplu88seeguaedts33la/fubupaxakijomipuvaba.pdf In PDF document text
    • http://zcapitalcrm.com/app/webroot/uploads/files/60954375219.pdfIn PDF document text
    • https://rmp-traueranzeigen.de/cms/files/48113860790.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1607dcae5566cb---vorixajapixugirudejed.pdfIn PDF document text
    • http://dhf-china.com/d/files/kijoxeferofasojagoximi.pdfIn PDF document text
    • https://lanegarrett.net/userfiles/file/55362028171.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/p6rpeq505v70f6qhoag21r5ev4/kipebonowigogitoxanu.pdfIn PDF document text
    • https://macroedunet.com/userfiles/file/66114772349.pdfIn PDF document text
    • http://industra.sk/userfiles/file/67256816484.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a62f8d283d4---20177889241.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081699f45068---68165863184.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/8977b286b9f71cc9c4a35868a5b9c13b/7772432780.pdfIn PDF document text
    • https://sharpconsulting.us/app/webroot/ckfinder/userfiles/files/bezisuvijaripe.pdfIn PDF document text
    • https://jf-orvalho.pt/userfiles/file/13614150146.pdfIn PDF document text
    • https://idea-web.ro/app/webroot/files/userfiles/files/dozefenemo.pdfIn PDF document text
    • https://solidpractise.com/files/userfiles/file/gawotobakudelow.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/32c2932d7f403e25b5fe9805d3ac75d1/27558773586.pdfIn PDF document text
    • https://a-metal.e-giant.net/archive/file/files/69806126775.pdfIn PDF document text
    • https://toolsatool.com/userfiles/files/70934079811.pdfIn PDF document text
    • http://urparitet.ru/admin/ckfinder/userfiles/files/benos.pdfIn PDF document text
    • http://johnmichaelharrisonlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zepebigikatukafojurasagal.pdfIn PDF document text
    • http://therealmccoyfamilyreunion.com/clients/f/f9/f9ea119420dddc0cc5ac7622830b9f68/File/pujomaligusokasemepuguvap.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2dd1a9684---91454916012.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=last+day+on+earth+password+bunker+aPDF 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_off0000c470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC470 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dc82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC82 17380 bytes
SHA-256: f1d58f4fc71e09ccd4eef0e5b9cefe113cff5c94298553807a3a3ab185480aaf
font_02_sfnt_off000108cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108CC 10840 bytes
SHA-256: 2ef3c4c4a270c8636bb4a68c4c87080b03251cf781e3c595546e5222327afad6

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