Malicious PDF — malware analysis report

Static analysis result for SHA-256 42414be6e27167b6…

MALICIOUS

PDF

79.5 KB Created: 2021-09-16 00:28:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7bdbc92b6913c2cee94643390dc7d9e4 SHA-1: 1ed64abf975ce48528e6a6a7e62d3517be13512a SHA-256: 42414be6e27167b6e2f0ce4a2f3e6b8c3e0083b3ee6ae263b7a53f7dc807124e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by multiple heuristics and an ML classifier. It contains numerous external links, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://garglob.ru/uplcv?utm_term=como+exportar+contactos+de+iphone+a+android PDF link annotation
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/9401909728695ad251ba3a7296741800/fafiziputukodowafumar.pdfIn PDF document text
    • https://drnanemilk.com/tctt/sites/aaa/file/74449493182.pdfIn PDF document text
    • http://fantasymusic.it/userfiles/files/79103848198.pdfIn PDF document text
    • https://wodepcb.cn/uploadfiles/files/40643093832.pdfIn PDF document text
    • https://indicaperu.com/userfiles/file/68758520460.pdfIn PDF document text
    • http://maiodi.com/userfiles/files/58941503099.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/5242080605.pdfIn PDF document text
    • http://isvpro.com/custom/files/lepugitig.pdfIn PDF document text
    • https://peoplehelppeople.net/uploads/File/88522800875.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/8583ccj9c01c9ao27nevrts339/35613995442.pdfIn PDF document text
    • http://pribatu.lamilagrosaimport.com/images/files/jixefawunorosujasugunukik.pdfIn PDF document text
    • http://trevelsi.ru/ckfinder/userfiles/files/rikowinukotexo.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/jujuwebuba.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bbefa019ea---xekabiwesimifomemin.pdfIn PDF document text
    • http://phuvuongcorp.com/luutru/files/pupokure.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/44545399589.pdfIn PDF document text
    • http://ambvetsanprospero.eu/userfiles/files/fifugefirarirozukup.pdfIn PDF document text
    • https://rajaunited.com/contents/files/65949525364.pdfIn PDF document text
    • https://ndmoyun.com/calisma2/files/uploads/42061522728.pdfIn PDF document text
    • https://dom4m.de/userfiles/files/66628676782.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_off0000cf4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e75c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75C 19116 bytes
SHA-256: 8e2dd4f601098ab4f666e0aa79e69a850b3879fcb8ec53ad92c725dd0ac7783c
font_02_sfnt_off00011819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11819 10864 bytes
SHA-256: b83c9314336e7588d7b1003b5011b2e92b8aabe983b772afd5e2613105aa2e5d