Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bb882b46300e606…

MALICIOUS

PDF

105.6 KB Created: 2021-09-07 16:05:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3189a19885ff0ce505cf610c4cc24c45 SHA-1: a62367b08d0c6e7d89f7218692681a7f361a2d58 SHA-256: 7bb882b46300e606af6cfa108a180d0aa77f502412cbbedf93fbb7ce4c4c5804
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a malicious intent to lure users to potentially harmful sites. The ML classifier and ClamAV detection strongly suggest malicious content, likely phishing or malware distribution. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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 http://katyababash.com/images/uploads/file/lisomutodasiluvo.pdf In PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a34818ebbb3---65762698183.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/aad15c2fed04cb8f60f0a3e4c149dd4e/neguwaruzatatopivo.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d95d515cd4---88697242006.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/161373c49aa13b---mimukufatuzavonu.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/mmjn78i4d5oqm7tamcttg1mes5/26815767143.pdfIn PDF document text
    • http://www.petercar0937494634.com/upload/img/files/24922076444.pdfIn PDF document text
    • https://stmarys-perthamboy.com/upload/File/fotixegigabutilipozo.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c4af6bb5b05---zoxafej.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/22449106574.pdfIn PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/38466787573.pdfIn PDF document text
    • http://okwecare.com/usr/userfiles/files/40716501531.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/nezexigu.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2aad2ccc42---33196531312.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b5135393fa7---76848138367.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/b2fukt1nkki10rdl94vib0u4go/58229868414.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6807aea5c---84565708893.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/07149b6ee08ede8c9eaf46a1a4ac61b3/tosokena.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210617112730539.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=heisenberg+uncertainty+principle+pdfPDF link annotation
    • https://www.unimedbelem.com.br/painel_template/assets/global/plugins/ckfinder/userfilesfiles/busikirapuzu.pdfIn PDF document text
    • http://alessandrotria.altervista.org/areap/ckfinder/userfiles/files/18365121368.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_off00012b3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B3C 23108 bytes
SHA-256: b4e6d2f58f5b9dbd656081bbab33c7220d4a37fb518b22804df978a79d8e4f62
font_01_sfnt_off0001674f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1674F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017f66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F66 11020 bytes
SHA-256: 322880551445abb1cfe721c654b84a426b3f79411b709700e0e3f9acfa2d4c22

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