Malicious PDF — malware analysis report

Static analysis result for SHA-256 d48db12488adb9fc…

MALICIOUS

PDF

85.5 KB Created: 2021-09-03 00:12:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 88dba83d034692abf7c7014b460f2f53 SHA-1: d30fbb199304afc80fd52c0d36c1ac96d102017b SHA-256: d48db12488adb9fc87150ab6cedcf1147648f1779f93a1c1724114ab9169d0fb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and the ClamAV detection indicate a phishing or malware distribution attempt.

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://pixomot.ru/uplcv?utm_term=japanese+conversation+for+beginners+pdf PDF link annotation
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/tesetuwesoxowalarewodig.pdfIn PDF document text
    • http://bulmarconsult.com/files/10838831598.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160fd89d7468a2---91600773036.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088830c38f0a---70461048311.pdfIn PDF document text
    • http://amdind.com/userfiles/file/96007169741.pdfIn PDF document text
    • http://yourhealthyanswer.com/ckfinder/userfiles/files/basatebuzotepivuzeraweb.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/funeradesibajigofurujuzab.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfdc533068---75825407534.pdfIn PDF document text
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/73293383299.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/japo5gl4meink4t8gua4jvgrb4/wezagedaramutagojusexamaw.pdfIn PDF document text
    • http://exmar.it/foto_fck/file/77162721008.pdfIn PDF document text
    • https://cihangirhotel.com/upload/ckfinder/files/45952286645.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb8ddd4fc4---25735543274.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c1f92c0f7---80739161870.pdfIn PDF document text
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/11676125119.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/lodolisuvizixaxiziluwasa.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/fkcjvh52aa5a39osncrfrnbtk9/warumevitu.pdfIn PDF document text
    • http://cauthinh.com/luutru/files/lunogevezozagisokiju.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160b02053c1066---nopevowe.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/9308526372.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b1d3c71716d---93290164961.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/digenezabexaxuk.pdfIn PDF document text
    • https://campermagazine.tv/public/file/20097308197.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/1dtup8f4n0h7qhv93gj0q2panu/fatagefutugit.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_off0000e977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE977 17628 bytes
SHA-256: 469a663eb4925ef9c15df6897423bd7888954b8244ff1fb8d1ca9614f75cc6e7
font_01_sfnt_off000116e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012efa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EFA 10948 bytes
SHA-256: 0f04377cb39d84428f4496b2d5c4f00a1c379c3c41ae62cb627f7605457944eb