Malicious PDF — malware analysis report

Static analysis result for SHA-256 29c9d0db57bea199…

MALICIOUS

PDF

85.4 KB Created: 2021-08-20 06:08:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2f3b6f9066aaa0ba22b0db58a319ff80 SHA-1: afffc137f83fc6eae09b66b36421355c99b0fa7b SHA-256: 29c9d0db57bea199f5b52e1d50c80353bc580a7d84fdcd855b78da58774d8b36
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload storage and 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 distribution. No scripts were extracted, so the primary attack vector appears to be the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

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://www.tiande-global.com/ckfinder/userfiles/files/fezikaxolijaxamokuvaxa.pdf In PDF document text
    • https://kham.vn/userfiles/file/86059266084.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/60943bdd2ddc93f9fa797995fdb611f3/32208352235.pdfIn PDF document text
    • http://blissrenewbeauty.com/newerac2c/userfiles/file/babobujoxavulatesekef.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/f1c30b31a9d91cdf0820eb7d9af07aec/kenox.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/12119c589aa89a700c10b97754eaf7d3/selabedolub.pdfIn PDF document text
    • https://bunianco.com/other_files/File/26912609758.pdfIn PDF document text
    • http://ordinate-ltd.com/file_media/file_image/file/95883615904.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b86f25ad866---bujubemo.pdfIn PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/lopafikifonozinivusogexap.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/38185100669.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/44a1eb4fba5d2e4cf027af0cc0398870/75125418961.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-3/20210503175922565042.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/53632410768.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/31a4f57c5e53c636f5de9989a221b954/xorabiluwegaxukizuxi.pdfIn PDF document text
    • https://oilbasaro.com/web/images/ckfinder/files/20210627142154.pdfIn PDF document text
    • https://citytrafik.nu/images/file/2401924472.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/60d4d5ac3282e17c45ad62c2677c985b/79080591162.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/bchqinehkrj5cithm5sgf9itmf/gozejedozimoruzewununez.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608b09b272938---gewatulu.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16071a24879b55---83670143089.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160888718d0466---datopuvubarabiron.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/bilonijesipawifuwo.pdfIn PDF document text
    • http://scpt.it/userfiles/files/tesoviwotagowa.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160bbf48bc7d68---dumozifikojuwipojal.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160874b39beb13---21159745009.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/e4c948d38132946ff813d2e1f2d4a089/kuzotiwaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+trauma+release+exercisesPDF 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_off0000e9ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C3 10568 bytes
SHA-256: 7b774bfa9c4898b52cfe302c52376ddbe4da252ef3488908b15a0b6d53321eaa
font_02_sfnt_off000119f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F8 17180 bytes
SHA-256: 2582d622cbb6bc43f5f492d6b340dbaad12e5b11004e5bf7b30894c6f745f79f