Malicious PDF — malware analysis report

Static analysis result for SHA-256 8912eb3efcf3a2fc…

MALICIOUS

PDF

87.2 KB Created: 2021-07-01 21:36:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eacd857fbc0aaadcee435821899a2b22 SHA-1: 94ba76114383b072826bd4bacda7ee5d6f603fe9 SHA-256: 8912eb3efcf3a2fc57249ccc02c61a2abec596dd324dff7a8e703c217b4e61a5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The presence of embedded JavaScript and ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely phishing or malware distribution. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/dpvvkugiv18ig9pui2qi55q182/wupimaduvakepikive.pdf
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/up86kflmhpqki2pk0d7ns2lqf0/54894412353.pdf
    • http://hongshengfish.com/uploadfiles/2021052314064529387.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ab2d44e5a---xozevijizasowixorimuti.pdf
    • http://yuha.be/_files/file/logukurife.pdf
    • https://snqrsl.quebec/upload/editor/file/22056395094.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16070a775e3513---70527559587.pdf
    • http://net-marketing.hu/images/files/fuzonijonixawibakoxo.pdf
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/d04e89976a439bdddfd3fec9a72a6ba3/minibewejefojokafubupor.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609f0dad7088f---vodebexeritipomonano.pdf
    • https://kibledergisi.net/resimler/files/zabarolovukozawizupuluwo.pdf
    • http://jamessham.com/admin/usercontent/file/zokowevomevilena.pdf
    • https://surupaceanu.ro/ckfinder/userfiles/files/nomamiga.pdf
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/kk2a9n2lh6p4qepakn8te8ggrt/60564502037.pdf
    • http://abw10thstreetne.com/uploads/files/52159150646.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160afa877e5d0e---28886083486.pdf
    • https://syteq-pro.com/userfiles/file/poxulejip.pdf
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160d3d68374603---63773554230.pdf
    • https://study4student.com/cache/fck_files/file/lonekadikifuzoniro.pdf
    • http://treeoflifetolfu.com/clients/0/07/07f122ebb3396bb3f917f2e62af81596/File/sewigotibaleva.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160b6ac070d3d8---24989758778.pdf
    • https://octvads.site/js/ckfinder/userfiles/files/34293153005.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee47284ba3---80612696881.pdf
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/f2a7f7565218f54d29f91355aec35504/lakubix.pdf
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/e0f9b208dc0329ab12388a053709847a/1698036422.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=as+they+say
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddf6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF6 16792 bytes
font_01_sfnt_off0000f60c.bin
18c4f054eb95d75ce786d9f16600bbaade25284c2e12723271ad3c00d8e05513
pdf-font-stream PDF embedded font (sfnt) at offset 0xF60C 9836 bytes
font_02_sfnt_off00010bdd.bin
941f9f9fcefaf6a4a29a9d435c20b3969e4a0a156cc9bc38e659e50b09bc9075
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDD 16304 bytes
font_03_sfnt_off000121a3.bin
e0754addf56acb813af479b8a0ae731cb18ed030616019ab086e9be50e3fcef1
pdf-font-stream PDF embedded font (sfnt) at offset 0x121A3 17904 bytes