Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6301126c128bd39…

MALICIOUS

PDF

104.0 KB Created: 2021-08-04 15:43:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 357582871c589151d1c329cfd3ff1721 SHA-1: 1405d1e4e87e8a623cc97f2e35fe18945a21467c SHA-256: b6301126c128bd39e8b2194e3d4d7d3edd3d62282d2e3cb353f7863f6f31c526
124 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress sites. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The file's primary function appears to be directing users to external, potentially malicious, resources.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3945

Heuristics 5

  • 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
  • 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://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092b00f2fd44---9657484480.pdf In PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/duboxabonaja.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/vgv70s32lfjp20puam1jdnmoq6/46628632675.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/fe87fc090384a693457ae08ccf492e26/95821652155.pdfIn PDF document text
    • http://applecentervn.com/uploads/image/files/vasumusopabifogopigeze.pdfIn PDF document text
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/79983072589.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/gomezenomejeme.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ed56108cc---75788093985.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/4bls7r48o20nckovbn50agjpm1/zulavoluvowasarobumudosa.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/15793797997.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/39ip09svajripc7bfs4nn51u0e/gomixokefilemiseva.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/b3e0242038e2c1f096a8dc78e9d7531c/fidewunumaxesebila.pdfIn PDF document text
    • http://berbun.com/user_img/file/93888879408.pdfIn PDF document text
    • http://leasingtowers.com/ckfinder/userfiles/files/20951865118.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160824125e3332---36350042489.pdfIn PDF document text
    • http://belhavenhighschoolalumni.com/clients/13962/File/kubugawuripaz.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/b4b2vp7abe0lj9bt4p1ju9dna4/61420011615.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160904708269d2---71726262282.pdfIn PDF document text
    • http://amongelite.com/ci/userfiles/files/98785653145.pdfIn PDF document text
    • http://westernmaki.com/uploads/files/gefazivajidofigumotow.pdfIn PDF document text
    • http://dfh-consulting.com/userfiles/file/24133423687.pdfIn PDF document text
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/92460127321.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/eonq2s2qtoshldv0d5umtqm537/zibalejupofir.pdfIn PDF document text
    • https://tasivn.com/upload/ck/files/birepelazipupedawexado.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=cadena+de+coritos+pentecostales+letraPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015c0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C0D 10536 bytes
SHA-256: e7ea737838689e5ea611c451b1a66bf3c61fc555c79a0ad907981dab61814e85
font_01_sfnt_off00017423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17423 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1