Malicious PDF — malware analysis report

Static analysis result for SHA-256 fafb75dd3624fd1d…

MALICIOUS

PDF

83.2 KB Created: 2021-09-22 17:49:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1aa0f402269d1cd692261cc8f640c448 SHA-1: 0761f58de8478dd3dfb35be5c34ba96a45b5e728 SHA-256: fafb75dd3624fd1dbd4a14cea48f9cb7153b00866b56b3de28f4342e241101f2
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external URIs, many of which are hosted on disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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
  • 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://garglob.ru/uplcv?utm_term=love+2015+live+streaming PDF link annotation
    • http://amicissiapiemonteisa.it/userfiles/files/5743568493.pdfIn PDF document text
    • http://ikkosushi.com/uploads/files/6721816996.pdfIn PDF document text
    • https://glozor.com/userfiles/file/lomixanisefoxomamegomub.pdfIn PDF document text
    • http://lynhuagiasi.com/Images_upload/files/59222769533.pdfIn PDF document text
    • https://mepho.hu/ckfinder/userfiles/files/10014999380.pdfIn PDF document text
    • https://hunde-katzen.at/soubory/vulemabapo.pdfIn PDF document text
    • http://yuqiaohome.com/uploads/files/202109052152235580.pdfIn PDF document text
    • http://ominocoibaffi.it/userfiles/files/7850574777.pdfIn PDF document text
    • https://koparieshorvathbusz.hu/files/file/91887318814.pdfIn PDF document text
    • http://ansonseatery.com/uploads/files/fabiwotibelinimam.pdfIn PDF document text
    • http://nigerseedindia.com/uploads/45025411841.pdfIn PDF document text
    • https://thanaclusterwestgate.leaddeehub.com/userfiles/files/21627046629.pdfIn PDF document text
    • https://goez3.com/10005001208290177/ckfinder/userfiles/files/domisasepanevasomidege.pdfIn PDF document text
    • http://autosvanbeek.nl/mindcms/js/ckf/userfiles/files/65650110889.pdfIn PDF document text
    • http://prograsifkalip.com/files/98378668784.pdfIn PDF document text
    • https://qualityroofinnandsuites.com/nbloom/fckuploads/file/gebuwafoki.pdfIn PDF document text
    • https://episcopiaoradiei.ro/files/mifagavonefezajiwunaza.pdfIn PDF document text
    • https://markaoyun.com/calisma2/files/uploads/dopekidexib.pdfIn PDF document text
    • http://paglialonga.it/userfiles/files/sujuv.pdfIn PDF document text
    • http://kaushalacademy.org/ckfinder/userfiles/files/46644768446.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/a75fc127057d6d4bee98f4d2b92ba540/kuwagit.pdfIn PDF document text
    • http://woykoff.hu/upload/file/85083304053.pdfIn PDF document text
    • http://www.teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/92903718912.pdfIn PDF document text
    • http://hladonural.ru/upload_picture/vufekebapojewarelut.pdfIn PDF document text
    • https://eminentland.com/admin/userfiles/files/wonuselematezisimugifa.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16142693e248db---21086648180.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021090320365683.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_off0000dfc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DF 10900 bytes
SHA-256: cf02a691c85e22cb39b09df4c97cbebb694e4d479ae3825baf60f201b47a1f8c
font_02_sfnt_off0001113a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1113A 17688 bytes
SHA-256: 4e42d2a3835de00a8b1f2825eca94126a69fd4b55b7957f8d185126f311bc2fa