Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e623d5266bc562f…

MALICIOUS

PDF

82.4 KB Created: 2021-09-22 19:14:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e062d79f8591e3d616dfa16d2a67281a SHA-1: d6be4501cd46bb1b19b1760363d5ad40242fae7a SHA-256: 9e623d5266bc562ff8698c9fb892f58d0e325288f0f7982fb5f93dd157e2044f
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to lure users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://crysiq.ru/uplcv?utm_term=android+app+to+sync+outlook+and+google+calendar PDF link annotation
    • https://812423.qqtogeljackpot2.com/contents/files/27866302893.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/toxewofuzosubowit.pdfIn PDF document text
    • http://steakclubhn.com/campannas/file/68570130972.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/5ce7a7jfv9auh8f8dh0956gmf5/11214716788.pdfIn PDF document text
    • http://sochisushi.nl/survey/userfiles/files/rebuz.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/26075156322.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd1aa83210---fiseze.pdfIn PDF document text
    • http://www.village-gaulois.org/gestion/ckfinder/userfiles/files/13096685515.pdfIn PDF document text
    • https://familienbilstrup.dk/userfiles/file/68185029464.pdfIn PDF document text
    • http://bestorkate.com/uploads/ckeditor/files/18100221320.pdfIn PDF document text
    • http://test-immo.com/file/31206455405.pdfIn PDF document text
    • http://maskaevlawyer.ru/userfiles/file/jisujusedizazokekasi.pdfIn PDF document text
    • https://dusunceokulu.net/resimler/files/buzuj.pdfIn PDF document text
    • http://parkingparts.com/Upfiles/file/74412662255.pdfIn PDF document text
    • https://hbphoto.ca/resimler/files/titoruredifuzeju.pdfIn PDF document text
    • http://stamforgtechnologies.com/uploads/xoviwopole.pdfIn PDF document text
    • http://ambartakip.net/belgeler/file/vupitokolibadenoxumona.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/90611840288.pdfIn PDF document text
    • http://bikaji.zohukum.com/ckfinder/userfiles/files/wefixipapidorunatuwobe.pdfIn PDF document text
    • http://uitvaartverzorgingsindex.nl/images/uploads/61985028660.pdfIn PDF document text
    • https://lanna-flyingclub.com/ckfinder/userfiles/files/menivobodotinosidubemuw.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/161415f9ddfb52---76085241504.pdfIn PDF document text
    • http://sportsbettingconsultants.net/cote_dor_import/admin/ckfinder/userfiles/files/89778541706.pdfIn PDF document text
    • http://hanabi-la.com/uploads/files/17723716049.pdfIn PDF document text
    • https://macintosh-szerviz-javitas.nuttydog.hu/ckfinder/userfiles/files/33241136183.pdfIn PDF document text
    • 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_off0000dd77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD77 10976 bytes
SHA-256: 4be6c401b33452375b28a28b50e1081f23622019d8558dbed953bf25601cf9c1
font_01_sfnt_off0000f6e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E9 17276 bytes
SHA-256: 592dfd1e524bc273768e577263e1d11ec59f8ecfbd17f2feaf80b978874f8548
font_02_sfnt_off0001237c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1237C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1