Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bd876f778e084bd…

MALICIOUS

PDF

91.6 KB Created: 2021-07-07 13:15:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 908ecf8704d54754568a3e0c374d7b31 SHA-1: 24cdcbaba4c37bf4d1b9d91a36620c9184f04c9d SHA-256: 1bd876f778e084bd090b7c48e25f854fe5fc12a34a5d039fa27d8e5f82cf262c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://wohntraumgmbh.at/29750626314.pdf
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/394ec1a73046d659c70acd7ebc9df1be/jumevumebiretogavek.pdf
    • http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/jikorunofizubutubefij.pdf
    • https://leosservices.com/userfiles/file/wezapute.pdf
    • http://evergladesharvesting.com/ckfinder/userfiles/files/5466955215.pdf
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/1abhbr9ro80m598i5pbecdvonb/4019774298.pdf
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607feaa3e17ac---medelaj.pdf
    • http://aliceinformaticasrl.com/user/pages/26445920772.pdf
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/eir0o2o6g2161b0ea51246svpd/60358930241.pdf
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad53758f698---dazefezazugaxalig.pdf
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/1df719c182d75c1a6e8535792b064a6c/datobabusakaduwisudorel.pdf
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/oej4lfci59d6kos5s0scvr2324/ratusibib.pdf
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/76020765031a228fe629c2afa995c506/guwijojegegovud.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/656dc5086750f9935d1b9d18acde81cc/61140505030.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a7f69994c---796593085.pdf
    • http://forresterfamilyreunion.com/clients/c/cc/cc72bfd2512333311cc1ef5a4fdef90f/File/12653800435.pdf
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/f1fb5c02a10cd79aec983f0037e904a4/somexubixakid.pdf
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/28b0fc32b784b3cb3df5129d4c85fba2/74061121737.pdf
    • http://easytravel63.ru/ckfinder/userfiles/files/bovijovafipesazu.pdf
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/40894e1e87395790a1912994a6e7128d/90745443081.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/0d33bc611163d8018280e8cec6277b3e/37582102453.pdf
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160829aa38e98e---lutakixu.pdf
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c0eaa9756---mudakemolusulaguzix.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=micronutrients+are+present+in+yippee+magic+masala
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010005.bin
c5b50610870b69ad945aef244580791da3c972097f072eadab24534281f0139c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10005 10924 bytes
font_01_sfnt_off00011964.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11964 16792 bytes
font_02_sfnt_off00013176.bin
5e5b1fc902a56032d64090fb4fa5f4db0a013d9670cbf714722d9c5b2f520dc5
pdf-font-stream PDF embedded font (sfnt) at offset 0x13176 17980 bytes