Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d383a2de9f37f53…

MALICIOUS

PDF

87.4 KB Created: 2021-09-04 13:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: d46f3d48e0c016f62e855179640bd156 SHA-1: 3659d7ee5ffd0a9d134c835aed4e811b1c897425 SHA-256: 0d383a2de9f37f5393f2579919fac32fa20886278039878a5764d13a9c551927
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URIs and a link farm structure suggests an attempt to redirect users to potentially malicious or phishing websites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a phishing or malicious content delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://gymostrov.org/gymostrov/userfiles/file/jebozax.pdf In PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d9b68f17d---wigaba.pdfIn PDF document text
    • http://thesnowmanicecream.com/ckfinder/userfiles/files/37175250283.pdfIn PDF document text
    • https://xn--mgbaf4adbs1bd2i.net/upload/ckfinder/files/9355363135.pdfIn PDF document text
    • https://dijitalsanat.link/upload/files/filamufevogitog.pdfIn PDF document text
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/8e0408128a85dc9d4edb76223d044f13/guvizujuwu.pdfIn PDF document text
    • http://milkexim.ru/imgeditor/file/29618165222.pdfIn PDF document text
    • https://noithatkuongthinh.com/uploads/files/walimazovijewikenujuzirer.pdfIn PDF document text
    • https://leifs-auto.dk/images/file/11105437269.pdfIn PDF document text
    • http://aktien-analyse.de/images/File/fesigiwugibefugel.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/59106359406.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adad7b03bf6---zajelisakomo.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/en3i3hsc36snhb91ilsoil4203/65633857141.pdfIn PDF document text
    • https://salvatoredivilio.it/userfiles/file/xifukedojal.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/tuwunulizeko.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3206e42b50---zurasobatemivunufapisev.pdfIn PDF document text
    • http://jorkurojus.com/userfiles/file/4802425193.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8e13cd17dd---pufav.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16095dfc96e3b7---12379582815.pdfIn PDF document text
    • http://954move.com/clients/4890/File/xuvuvomino.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/71509361331.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/fb7e0136eab5b3b28d53b04f82a33188/temivolaxifivosuvadu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=madrasa+education+in+pakistan+pdfPDF 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_off0000e63c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63C 10752 bytes
SHA-256: fd0d19f784ee2c59ee417ebee44b7b886809afdc6d37effef1aef994b45894ba
font_01_sfnt_off0000ff17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF17 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11729 21812 bytes
SHA-256: 280dd054523fa861b331a8277639bf9cf976f46fbd5de2f59b77d88a55ed05a9

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