Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f4670e5d284d42e…

MALICIOUS

PDF

75.3 KB Created: 2021-09-05 17:21:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 00d285fb292b94353cfe37fb7e6bbd87 SHA-1: fda3e1e4bd774f7c0b748392dd5eb75b9c211c25 SHA-256: 7f4670e5d284d42ee4498d763ba2b17cfec5520111084e9ea8abf37f70939861
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to potentially compromised or disposable hosting. The document body is unreadable, but the presence of numerous external links suggests the primary purpose is to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://campcolefamilyreunion.com/clients/82065/File/44886407085.pdf In PDF document text
    • http://abbuffalowings.com/uploads/files/buzazovijijati.pdfIn PDF document text
    • https://xistenze.nagydavid.com/files/files/50676348809.pdfIn PDF document text
    • http://vanguardhungary.hu/userfiles/file/jivoza.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/05c0d82eed41026ee25bdc116ab66e8a/71971476023.pdfIn PDF document text
    • https://pasarantogel2.com/contents//files/kegol.pdfIn PDF document text
    • http://caycanhtuyhien.com/uploads/image/files/povov.pdfIn PDF document text
    • https://horgaszvelem.elelmiszer-hazhozszallitas.hu/ckfinder/userfiles/files/68813757519.pdfIn PDF document text
    • http://tucsokszekszard.hu/images/news/file/xifudazirutafonafisodax.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8e76a63ba4---56501730403.pdfIn PDF document text
    • https://derechosenred.org/aym_image/files/tixomodiwavajofejiwomonip.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606caa4c122aa---89896807981.pdfIn PDF document text
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/693927fdf04c5ec236f0e3f06023a2cb/15498079559.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/bee2961b0f156c4cde1b8df46f9d8c8c/rixilapo.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072389a0f445---momapobofafawabe.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1679df286---sumuzogivawuw.pdfIn PDF document text
    • https://imagebuzz.net/ckfinder/userfiles/files/6795585953.pdfIn PDF document text
    • http://www.bash.cl/media/file/jogusubopubajubemewifil.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/xenodo.pdfIn PDF document text
    • https://ever-progress.com/upload/files/87177176857.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/161324971b9129---katenovigiwafatitetuj.pdfIn PDF document text
    • https://psg66.ru/admin/ckfinder/userfiles/files/nukugaratipananosoweb.pdfIn PDF document text
    • http://lovesushiscv.com/uploads/files/24824685374.pdfIn PDF document text
    • http://medicapoland.pl/uploaded/file/noloxumomipaxidemomifed.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=ipod+nano+gen+7+user+manualPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c34f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC34F 10648 bytes
SHA-256: 2a3f018059b6992bc36ebb8223560a88a9dbf5a5eb2ef9e09dac7d8390ed36fb
font_01_sfnt_off0000db78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB78 17008 bytes
SHA-256: 414f2cf219baff91c6e9a4ec624b22e1e0bc6f599fbd0e9f3e83f1fdb0404c73
font_02_sfnt_off000107d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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