Malicious PDF — malware analysis report

Static analysis result for SHA-256 474af7be17c5ebf3…

MALICIOUS

PDF

76.1 KB Created: 2021-09-04 12:30:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 75ad0ad10c275f6179f8daa83c0f4586 SHA-1: d376e6e0dac17d685c52286eeda7e536ee3c1067 SHA-256: 474af7be17c5ebf3092f5ed1a7c4cad858de831e18e2c4b51131603228b88037
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the presence of multiple external URIs and the overall heuristic profile strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://oniceh.ru/uplcv?utm_term=stokke+tripp+trapp+newborn+set+manual PDF link annotation
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608aff964c400---38919808135.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/tagewotofabutuf.pdfIn PDF document text
    • http://medizator.ru/ckfinder/userfiles/files/51496789030.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e829e26eb---70398547465.pdfIn PDF document text
    • http://champaigncursillo.com/userfiles/file/60616812790.pdfIn PDF document text
    • https://gamasteel.net/userfiles/file/bufelin.pdfIn PDF document text
    • http://asu78.ru/userfiles/file/jupojesopawobivafo.pdfIn PDF document text
    • http://cs-web-design.de/ablage/userfiles/files/17361058960.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/4beef10345e39022298402f152f28f29/bisugirubamurikibiwexo.pdfIn PDF document text
    • https://www.alugutader.fr/ckfinder/userfiles/files/sopifepe.pdfIn PDF document text
    • http://vita24h.com/uploads/userfiles/file/kixit.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/161207aa45d192---vonatanaximoru.pdfIn PDF document text
    • https://profesa.net/userFilesfile/kimowe.pdfIn PDF document text
    • http://moreit.ch/productinfo/file/nanunoga.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160cda7238053f---dudedezorukadanowan.pdfIn PDF document text
    • https://prestinieurope.com/userfiles/files/wovikepusutogela.pdfIn PDF document text
    • https://www.frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/kexexugatunozobedeg.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/24c0e7c04b43ca7f844b338849d33e66/18651883518.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/fe39bdc8b8264e3fa3033beeaaa2bdd9/81120622967.pdfIn PDF document text
    • http://studiolauramoschini.it/userfiles/files/selewokezi.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/92748157958.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/b77eb5ac2b420a5f70eaf39baf21786c/vagawuli.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

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_off0000c2f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2F7 10908 bytes
SHA-256: 94a758518db04a7650b59d2e0fdf546174f098883e09de1b8b8cf8c9dd1ecdb9
font_01_sfnt_off0000dc02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC02 18088 bytes
SHA-256: 15b66c8d0d480f6493c0574655ceff041628a98d92b122f1d71996b9a202f2a9
font_02_sfnt_off00010ad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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