Malicious PDF — malware analysis report

Static analysis result for SHA-256 d421b0a1bfef7cff…

MALICIOUS

PDF

85.7 KB Created: 2021-09-05 07:48:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 146b74bbfb968d91dfcdc4b2c29ad786 SHA-1: cc2101739cd2ad053a88a06b8d3357f2712929b3 SHA-256: d421b0a1bfef7cff3bc82d647ca767e39a58d2e0efd8e39e499ee800c1261862
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. The document contains a link farm pointing to numerous external URLs, many hosted on compromised CMS platforms or disposable domains, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the presence of external links and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://pistant.ru/uplcv?utm_term=present+progressive+future+meaning+%C3%BCbungen+pdf PDF link annotation
    • http://bjerkelunden.org/content/files/userfiles/file///batodovu.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/8d3c414e29fb4ab29829039fe2560ac3/14676442518.pdfIn PDF document text
    • http://spy-military-labs.com/userfiles/file/89637829659.pdfIn PDF document text
    • http://emannsltd.com/userfiles/pikonoxelabalate.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/55749340590.pdfIn PDF document text
    • https://fertilizergranulatorprice.com/d/files/1019161393.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/41881898248.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/a65cc946d1bf3bac8fef448f25232d00/60730597109.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/muzutalosifekitexo.pdfIn PDF document text
    • http://resetimpianti.it/reset/public/file/27623183836.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/p4qefh47fno5tl3gcklgib88am/49911430380.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610ff0183f561---vipose.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/fe70b32e4978afd7688fee6e15238ce5/51565898812.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7c0e44fbe---jijekufewoba.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/31b8c47d8a9162279c864759c7b69901/didagemazupok.pdfIn PDF document text
    • http://vandientuchinhhang.com/upload/files/68512522127.pdfIn PDF document text
    • http://vdavloeren.be/userfiles/files/99054533949.pdfIn PDF document text
    • http://tensoinox.com/userfiles/files/fugokig.pdfIn PDF document text
    • http://cateringkieuan.com/uploads/userfiles/file/nulokilumenoxemefakesapok.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/1d5cb15c9da931da2139e27b6c1df0be/56588918994.pdfIn PDF document text
    • http://picassogift.com/Uploadfiles/files/tukexulevapuku.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/8cd7d794d3aaa243efb601182938d1a0/34618741414.pdfIn PDF document text
    • http://kvbm.org/pds/userfiles/files/pepug.pdfIn PDF document text
    • http://greenplanetnepal.com/userfiles/file/43413090562.pdfIn PDF document text
    • http://santeh.md/img/files/4731394440.pdfIn PDF document text
    • https://serwisnawigacji.pl/userfiles/file/zukutejuled.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a94e74a5661---mixupu.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_off0000e14b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14B 11296 bytes
SHA-256: fa72b7e0c124d542315b4a5ae66c5ba9800babf87b3a2dccfe6e533cb9bcc00f
font_01_sfnt_off0000fb28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB28 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001133a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1133A 20048 bytes
SHA-256: 3a3f5dd7809b09d3451a2e1966fabbbec4b7a34ab8ed96d521724726ac2dfedd

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