Malicious PDF — malware analysis report

Static analysis result for SHA-256 2de0408391484d4d…

MALICIOUS

PDF

125.2 KB Created: 2021-06-29 21:30:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 19f527c0b54ee75c0a831c00df91363b SHA-1: bbbe60bf850e7e156d3d19c24da464c88bd09081 SHA-256: 2de0408391484d4d54d7a465c09405b712376b743ac3d8f9049d6aa07c93afa8
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and other disposable hosting, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of multiple external URIs and link farm heuristics confirms the document's purpose is to redirect users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://angkortaxiservice.com/userfiles/file/bevugevedu.pdf
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/b1389997cb5137fe6ee2e7a8415054f5/18773772709.pdf
    • https://angkaganjil.com/contents//files/99002542356.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16080ac0e4670d---45396821308.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160911752cbfd4---liwebetitevoju.pdf
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/9235a3d10cfb09f6666f18035ff58316/sunomokozasorewuza.pdf
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/d22e89ae592836d71197d624bc416c1e/44988746315.pdf
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/16074c5bf7e9b8---wotiwe.pdf
    • http://ekotop.eu/userfiles/file/likuni.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9e13724bf---87513178310.pdf
    • http://greenlivinggarden.com/htdocs/UserFiles/file/61556207009.pdf
    • http://bertoniamministrazione.it/bertoni/public/file/modedeluv.pdf
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/c33ff69447f198294761d026938de2a1/pavolipesokupubulo.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/9453466fa56310a5aeafd81490f6c1bd/pinijiximupedopabo.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/6nq6pvlc5k5vk8vpgc2vkfujl6/mugotimijamigituzobiviz.pdf
    • http://waltwhitman1964grads.com/clients/6/6c/6c9ae932573016e5ff31759a10dce4b4/File/dituxiromafizakar.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/kv8bglkfakui9bv9peajm3ut32/retegobifideti.pdf
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/4e4ebc932ceea7c3f25b192c072437b7/81910569052.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2af8526b54---45196048237.pdf
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/2b1b301a64c3c27911809c72b2786f96/lizegedotax.pdf
    • https://porterbrothersltd.com/app/webroot/uploads/bivozafupavikanup.pdf
    • http://mrpokedb.com/uploads/files/45267981020.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=as+good+as+or+better+than+others+of+a+comparable+nature
    • 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_off0001866a.bin
0be6365b1df0c668a29b62729dee9711db3662da25e40cacea9ea38f307dc082
pdf-font-stream PDF embedded font (sfnt) at offset 0x1866A 17616 bytes
font_01_sfnt_off0001b448.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B448 16792 bytes
font_02_sfnt_off0001cc5f.bin
b47c084bd1d70293616905d6db20b233871939c3ad41ba9140fdacc4be604b71
pdf-font-stream PDF embedded font (sfnt) at offset 0x1CC5F 11196 bytes