Malicious PDF — malware analysis report

Static analysis result for SHA-256 f02feeb28102d156…

MALICIOUS

PDF

79.6 KB Created: 2021-09-17 22:57:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a4235ac8a579c26abe02f85eb572b50c SHA-1: 9adbfabc1079f972b47050af5d09e4fde868e1f8 SHA-256: f02feeb28102d1564b9768094b0d6e1f7816a7a86323d23874494a48bae1383f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these external links. No scripts were extracted, but the overall structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://drafthe.ru/uplcv?utm_term=roms+para+nintendo+android PDF link annotation
    • http://platypusspot.org/uploads/ckfinder/userfiles/files/jetuzefutewu.pdfIn PDF document text
    • http://ahzgbh.news-read.com/upload/files/94387061969.pdfIn PDF document text
    • http://nguyenxuanhuong.com/upload/files/99726211247.pdfIn PDF document text
    • https://samowar.me/upload/file/77797142548.pdfIn PDF document text
    • http://hyundai-baoloc.com/luutru/files/26320033183.pdfIn PDF document text
    • http://pantipplaza.com/userfiles/file/71263219961.pdfIn PDF document text
    • http://sola-brothers.com/userfiles/file/pazas.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614487505bce7---bokazofejakokigipejar.pdfIn PDF document text
    • http://elfuklid.cz/foto/Image/file/gedezomigogivu.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613584dea465c---79072536818.pdfIn PDF document text
    • http://jedzenie365.pl/ckfinder/userfiles/files/90429235600.pdfIn PDF document text
    • https://lean-ds.com/upload/editor/file/9606686545.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/isg403sc931a9rkahfm079qsf4/bepenatoboxuwusu.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/20450800255.pdfIn PDF document text
    • http://xingzhongjing.com/userfiles/file/20210907062808_1299621685.pdfIn PDF document text
    • http://colokit.thienlonggroup.com/Images_upload/files/72114333726.pdfIn PDF document text
    • http://atrsara.ir/resource/files/pazuruvoraj.pdfIn PDF document text
    • https://trexanh.net/upload/files/52113535546.pdfIn PDF document text
    • http://italy-ex.com/images/blog/file/xaviz.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/jomazedobosini.pdfIn PDF document text
    • http://seattlebestteriyaki.com/uploads/files/boxeles.pdfIn PDF document text
    • http://turksebruiloften.nl/userfiles/file/wetesodosaked.pdfIn PDF document text
    • http://neodentpetrosino.it/userfiles/files/tazegixigitugufogalo.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_off0000d266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD266 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7D 10552 bytes
SHA-256: 1fe3bdec647b4bd9dc0c67eb5853e3aea8f2d912cc9fe8f9596b22eb74859ed6
font_02_sfnt_off00010282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10282 17972 bytes
SHA-256: e7c67803ec6a4914f625aa7ae9f39873489a16ea98f4ca446b47e8ae873766e7