Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fb42a156af77807…

MALICIOUS

PDF

147.4 KB Created: 2021-07-25 03:35:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 8d8ba5a2c27f069dd85d708899c9a95e SHA-1: 7bbba222bf33a4df0cd27eb45f6fb12f79dd7fe8 SHA-256: 0fb42a156af7780708fbc006c7988b874953582a4a48436a86333a0f154a1453
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to compromised WordPress sites and are structured as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and URL analysis suggest it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf943d600c0---gubefegoku.pdf In PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/juzotigekitufizugakok.pdfIn PDF document text
    • https://everestart.com/images/stories/file/kikedixivutot.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0fdb0a6034---54014392957.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/eogqvplrukmnr5qnc6cj5q1867/vijarexawubutufigejigorum.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160901b90d1a88---gebofe.pdfIn PDF document text
    • http://ambulatorioveterinariocamali.com/userfiles/files/rizegupalow.pdfIn PDF document text
    • http://obasekiestates.com/UserFiles/file/28709390588.pdfIn PDF document text
    • https://blokhol.com/upload/files/16974984900.pdfIn PDF document text
    • http://toicodonlyson.com/uploads/files/sipow.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/raweguleseraripojegemun.pdfIn PDF document text
    • http://studioarclab.eu/userfiles/files/tofutopib.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160730ca7547a3---pelivilinuwokozoj.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a88f8cba06f---40941998855.pdfIn PDF document text
    • http://totoquynhhuong.com/upload/files/74297986361.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/v7tvptgp18q9ingfinvh6ts979/vozuse.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/f2215b093d594da7432273f5e7afd143/nunifu.pdfIn PDF document text
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/o77mktvi4lb1jfuva3bp2vbvls/72653330543.pdfIn PDF document text
    • https://panificiopasticceriabattaglia.it/file/pupugeravabudinawuwe.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/94872473734.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b7aa87f64---11784614519.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16092241aa8cc3---pofasedisoluludotidofewe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=biografia+de+periclesPDF 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_off0001d767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D767 10644 bytes
SHA-256: bf0cbbb349e47a251d085ffd3ced94d360209c594024ac6ed13c30129a1544cc
font_01_sfnt_off0001efaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EFAA 21560 bytes
SHA-256: 1e6c9e6244dd658cff420a8a841e2367b538382b8fe494a80a0c3107a4af1ca7
font_02_sfnt_off00022778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22778 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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