Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbdb7cdd9353955a…

MALICIOUS

PDF

92.4 KB Created: 2021-07-03 03:38:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 7d4e8f722e8e4d2c50b7e0ac0d7cc052 SHA-1: c14bf2d205e22b61ca0eacbf4e4199d907be553d SHA-256: bbdb7cdd9353955adcfc994d0b2a583391f733633c97600a8864134835968837
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, many pointing to compromised WordPress sites and other disposable hosting, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The presence of external URIs and link farms points to a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://kompaspt1.com/contents//files/derinutufezudebopesibabu.pdf In PDF document text
    • http://abnicum.com/files/file/32480624336.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/buguzekekoxix.pdfIn PDF document text
    • http://rotarylaspalmas.orgdocumentos/file/98885081832.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608319f803b5b---tafevax.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be7b0373385---99387676769.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/decc2267bbf595412d8928a98e624317/85710553867.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/1g4ff81ga2a5tge76ie56aj6hm/kakisulubedat.pdfIn PDF document text
    • https://digireg.nz/upload/91086513445.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/46813522305.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/msof434o7mvfb7plubh0r3brj2/bixovapa.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/16095be0cb9b18---fexuzivafopimojenobofumi.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/01c7cbf0d00f930d220eb38307150587/fibasonudomemisepukozem.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/2a5ea4b5b9e51eee6ca9e356ef60d9fe/majerewitub.pdfIn PDF document text
    • https://360mart.net/uploads/files/mogek.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160994e8798ff6---30721609440.pdfIn PDF document text
    • http://austintownfitch1980.com/clients/879833/File/zomudonarize.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/jolanaperawenub.pdfIn PDF document text
    • http://xlsferrosilicon.com/d/files/82485521845.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-5/file/51298705068.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/ci9ls89c77s5damnjm43goig06/fapavuvaxegesi.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16073dca76a500---31433318601.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16087020342069---8752597361.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a22fa20b95e---12555155204.pdfIn PDF document text
    • http://wisdomtours.net/upload/file/wusamadogaje.pdfIn PDF document text
    • http://dentish.ru/ckfinder/userfiles/files/26445287415.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=inauguration+day+2013PDF 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F1 18268 bytes
SHA-256: 3601cd2696d7166989cb81b1fa51a249d2fafc1544dc3d6bb398b446ec113bd5
font_01_sfnt_off000133ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014be5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BE5 10708 bytes
SHA-256: 49404d6853488e2405775189cdeb0725c4537d1c2bc88fefdae55fb4939af4d9

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