Malicious PDF — malware analysis report

Static analysis result for SHA-256 770f932e00e5edce…

MALICIOUS

PDF

88.8 KB Created: 2021-07-05 21:03:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 24261942d0ce3cf3da2ea6d6720a8273 SHA-1: ed21a1adb311528c4c46737df3715ffbaec1f769 SHA-256: 770f932e00e5edce343237ff0019f651d05f9ab6904b8da02223f21d95cf7be5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites, suggesting it functions as a link farm designed to redirect users to potentially harmful destinations. The presence of external URIs and the nature of the links strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16096b1af83c79---pafezutogikawo.pdf
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160dda4f101b10---vosanasugijetogijiregaj.pdf
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/nilepenefupofatugan.pdf
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/f980e74be23406360a4c1f27caee3ff4/28996242515.pdf
    • https://aduanaldelvalle.com/userfiles/file/51064708274.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b45a3dee2---gapisikoxux.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160823c08e3137---35316120924.pdf
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/35939c173ccb003c36d3b3d66335118b/boforitolofutaruvi.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160ba87cc8730f---bixokivogom.pdf
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/16081963767f73---sesisusora.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5aba5964a---54994590758.pdf
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608170bb29b7b---giwovemoj.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9bc2353a1a---54470034932.pdf
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/2d10731134482e913ab2de6e85c448b2/89327911657.pdf
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a050a70c477---pabobafukosap.pdf
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f16454f15---63813513239.pdf
    • https://acryl-bg.com/userfiles/file/29675266632.pdf
    • https://unibel.pl/pliki/upload/file/panusifozete.pdf
    • https://travelsafeway.com/userfiles/file/zenodelojafo.pdf
    • https://peptidturkiye.com/ckfinder/userfiles/files/zaxevituxoxowot.pdf
    • https://raiporjai.com/piceditor/file/4658312580.pdf
    • http://pleasanthillpchurch.com/clients/5/55/55aa087cacc886b2254ddcc242c0699b/File/4146624861.pdf
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c30b10110f6---zezigebevoter.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c77d54ff83---lubiribotiwaboromijewojaf.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=numerical+aperture+and+f+number
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f620.bin
bde777f46128d99cbb73b055aa73eae8e550a94d59e57335230818426543ac2a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF620 10708 bytes
font_01_sfnt_off00010e65.bin
ba82d411acdb492f104b6b8786ba0c5ff02ebfee98f9633aef45d2001a8b66ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E65 17900 bytes
font_02_sfnt_off00013dae.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13DAE 16792 bytes