Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccaeb4785789c90d…

MALICIOUS

PDF

91.0 KB Created: 2021-09-08 16:32:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 63a7e21478200eabca8efb01db07fdb0 SHA-1: 2da67298b62eef498330078b71d60b7639b7693c SHA-256: ccaeb4785789c90d5b6fbc9a157df935056dcbe10ee9d67f57358fe3bde20ba5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external links, many of which point to compromised WordPress upload directories, suggesting a link farm designed for SEO poisoning. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a phishing or malware payload. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://coretry.ru/uplcv?utm_term=quezon+city+science+high+school+application+form+2019+pdf PDF link annotation
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/056e301e58e04bce35c356c28236618f/mivamonomosilelufamav.pdfIn PDF document text
    • https://mama-light.net/business_school/uploads/file/rujolizoxabakewopil.pdfIn PDF document text
    • http://aan.kz/ckfinder/userfiles/files/kagap.pdfIn PDF document text
    • http://www.hz-kontejnery.cz/ckfinder/userfiles/files/31411643527.pdfIn PDF document text
    • http://wittymall.com/multimedia/userfiles/file/xudetuforewe.pdfIn PDF document text
    • http://itcbeautytrainingschool.com/userfiles/file/44618022570.pdfIn PDF document text
    • http://gddfboiler.com/uploads/files/kapulu.pdfIn PDF document text
    • http://ainut.fi/userfiles/file/52186008167.pdfIn PDF document text
    • http://location-venise.com/italie_documents/files/32288381157.pdfIn PDF document text
    • http://eskuvotoszkanaban.hu/editor_up/xesonunejerulamol.pdfIn PDF document text
    • https://hohsingfiber.com/ufiles/files/44230212970.pdfIn PDF document text
    • http://0vote.com/ckfinder/files/daposobevilevelu.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/b34b5091aedfbf58e5fb2d31826168f1/81422800954.pdfIn PDF document text
    • http://toszegisuli.hu/userfiles/file/83179307555.pdfIn PDF document text
    • http://phutungtdc.com/upload/files/ribumapinoxelovale.pdfIn PDF document text
    • http://seidels-mineralienwelt.de/images/uploaded/file/redadozape.pdfIn PDF document text
    • http://dansensvenner.dk/imagesfile///tokololesipojal.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/0e3ffecb7b53b568a7fccd48182f3ead/bepezuluwezozi.pdfIn PDF document text
    • http://bkht.vn/userfiles/file/wonosasunaxaritexulimex.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/rifipoxivebogorabipav.pdfIn PDF document text
    • http://kesherisrael.com/uploadEditor/files/talelidix.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130bf28abd48---7210786650.pdfIn PDF document text
    • http://slkuang.com/v15/Upload/file/202192051534123.pdfIn PDF document text
    • https://hr-serdahel.hu/images/file/nufak.pdfIn PDF document text
    • https://paeonia.ch/userfiles/files/vubiwu.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/8rpg75c4m0vnpplfp5dp8kq426/sikux.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_off0000f5c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010dd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD2 19756 bytes
SHA-256: eb0d91b91c6fd81bccc8878152f58606bf44ab8144957695577841f24c577a40
font_02_sfnt_off00014189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14189 11864 bytes
SHA-256: 9a73d08df21a658bb90b916f00c71d86fef688b9db924a76dbdd58133e9a2e3a

Open this report in the interactive analyzer, or submit your own file for analysis.