Malicious PDF — malware analysis report

Static analysis result for SHA-256 325cb44ec6ccabcb…

MALICIOUS

PDF

74.8 KB Created: 2021-07-17 05:45:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 026bfc01798ad5277e3b8b37ba168b21 SHA-1: 9e36728b764ac49cc02ad4a35c7002ea364d7a93 SHA-256: 325cb44ec6ccabcb947a685bbc671a833e07e0a351490c54b6972d971283ddd5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing an embedded JavaScript stream, which is a common technique for delivering malicious content. The numerous external URIs, many pointing to compromised WordPress sites or disposable hosting, indicate a link farm designed to redirect users. ClamAV detection and ML classification strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 https://onlinendttraining.net/files/31063737565.pdf In PDF document text
    • http://globalquestconsulting.com/userfiles/files/63148583562.pdfIn PDF document text
    • http://raisemoneyonline.org/clients/6/69/691275cf9a36cab982b2498ebdc715be/File/nezopomapuzobo.pdfIn PDF document text
    • http://surrattsville69.com/clients/8/81/8122276c22396d7fa0996010cc369f50/File/50278461782.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a358d538e30---94357287036.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c94c587fbd4---ropitisuravununa.pdfIn PDF document text
    • http://suacona.com/clients/16856/File/xopejudofirif.pdfIn PDF document text
    • http://lisaarkinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lagopidaragadesegixusuvit.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/79641259631.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e26f1b8c222---xefozizajav.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/51178495675.pdfIn PDF document text
    • http://tavaszitura.eu/userfiles/files/48393385205.pdfIn PDF document text
    • https://kaptenhoki.info/contents//files/fegavuv.pdfIn PDF document text
    • http://briarcliff70.com/clients/874901/File/pajilutemosugijijaw.pdfIn PDF document text
    • https://mamo-tato.ro/userfiles/file/fabelivepoxinusukefu.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/a3b7944d579a778ca70d1b3cb44efa2b/pezemu.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071fb6aa555c---pofemajubul.pdfIn PDF document text
    • http://myboydfamily.com/clients/7/7f/7f513a2250c12de81a70a6735749c289/File/lugebobewevabeparilijere.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/16083f32a8a768---35779539513.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df42c11efb0---jirime.pdfIn PDF document text
    • http://taketty.xyz/js/ckfinder/userfiles/files/16315201669.pdfIn PDF document text
    • http://autoscuolapezzano.it/userfiles/files/65659594249.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/74e77a9ad095a4b8219430e609f5ba32/rugusufer.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=kenneth+hagin+love+the+way+to+victoryPDF 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_off0000c219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC219 10596 bytes
SHA-256: 3c117db61dd8fb6f5c5db04bc79cfc8dfb649d1844a6bd8aab1a6ce0ace7a3da
font_01_sfnt_off0000da4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA4B 16660 bytes
SHA-256: ceedf6a9162b1062f87eb83c776a164af5e33e13bfdc9aa6bb743efc9af24683
font_02_sfnt_off000105b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1