Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f1e9df00d8c603a…

MALICIOUS

PDF

111.8 KB Created: 2021-06-10 05:37:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3efbc1a7c7d0bd0e63745d28a3b1c5a3 SHA-1: 9f5b5b5f5cca59f1c35e869cdf4e7e8f034be526 SHA-256: 8f1e9df00d8c603a1df9f65d38a2165333996b0d2286fce52aea4c8fc5160c32
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier clean score 0.1688

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 https://coretry.ru/uplcv?utm_term=immersive+full+screen+mode+pro+apk PDF link annotation
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/l0iii2d5vr2lchf0qcur9fmkv6/74711454915.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079761b47a60---gagojemope.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/bea44a43511181822bfc752483d7ce2d/bimodinajigo.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a9dc359c85d---16756160926.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/eb0sqf9kp1eqi103m8ot92vttr/zetusugasetojunatajasezuk.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a65d7a599d2---13115305751.pdfIn PDF document text
    • http://duszek-lasu.pl/userfiles/file/kejaxutabugo.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a0fd05ce352---16742845150.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/lovenubuwufenijexavunol.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/82247366150.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6adfa455b0---14582795201.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/19085708333.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608785db12e3e---33270334863.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/13493bccd683497b14794513f77c29d1/17690644339.pdfIn PDF document text
    • https://wagaskar.com/media/79321820046.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/waropubir.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/2cl6s7huc1av4hfnfnsf6k1dh4/4092043327.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080de3fc2b80---11407472605.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/lgpl.htmlRegularDanhHongIn PDF document text
    • http://www.geocities.com/dnhhngIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000152dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152DD 8520 bytes
SHA-256: 99ea6829de078bdd2b4c3aa568b176409096b1d97984bcd7441585c06b5c658a
font_01_sfnt_off0001694f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1694F 5856 bytes
SHA-256: 2290a15947cfaeac7fee7c9b53f7f6379b89f0fe909e6f0c168adb3df1fc79ce
font_02_sfnt_off00017db7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17DB7 5164 bytes
SHA-256: 5d0bfd276927eefc870f7f72f3f2e52d7b501bd88caf4db1b292ffee4be11cc6
font_03_sfnt_off00018f1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F1F 5700 bytes
SHA-256: 0a87f45aeeffa5c073bfc6683d66510a783e894b353eb164451ed814a4eefe97
font_04_sfnt_off0001a07b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A07B 4316 bytes
SHA-256: a90ad875ef861da84aa5915d576547bbe90e6bc788e45f1c1bae7cb40535d4c5
font_05_sfnt_off0001b10b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B10B 6148 bytes
SHA-256: 4910d0177da9f60ecc92c13a34fae8c5c38ffafb9e4e22a3c3fd987548b79157

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