Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ccc68aff1b3c9c5…

MALICIOUS

PDF

91.7 KB Created: 2021-07-14 07:48:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: dea38727531c63fcc6b3d6ab8bca13fe SHA-1: 9feb911dcc2424bfa2541e60aa5448297afb119b SHA-256: 2ccc68aff1b3c9c5f0a92d2eb76445dd2d5e853430a45672ce3af764fd18b754
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple distinct hosts, many of which appear to be compromised WordPress sites. The embedded URLs suggest an attempt to drive traffic to potentially malicious or SEO-manipulated content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://crewmak.ru/uplcv?utm_term=my+father+essay+in+english PDF link annotation
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a24c6da3753---bokutukopopidetu.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c5325369a19---wubebase.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/c3302fb7b94bd0155857bcfa47d65e0c/99684184165.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/79878851446.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d73520218a---xubovuwunatulubipinub.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/3cjojaqikl1mtk8m6392j6h1c7/kuliwogozizuvexebe.pdfIn PDF document text
    • http://kirakuramenandsushi.com/uploads/files/90770405931.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/aa53f4b4d4a21eaa18e3499c97043f58/pakamusokeve.pdfIn PDF document text
    • http://tfforming.ru/d/files/75405516051.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/q9l4bncsu2imagc3n79m3dq9q7/wuvupojapawa.pdfIn PDF document text
    • http://lyonsmcafeereunion.com/clients/a/ab/ab8eb7fa8d7cf94b91f67e7e346c80ed/File/wikiwusuzelerobep.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cef199acd3---17355422692.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/ca900cff880ca7913904c394f69792a1/46521674340.pdfIn PDF document text
    • http://arcadia1973reunion.com/clients/3/33/33cb7023d77084166ed027ca16b579b7/File/doribotu.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/594c4edf055043b52e0a7b8e11c9dd57/44840440747.pdfIn PDF document text
    • http://chatfieldfarms101.com/userimages/suripelikorali.pdfIn PDF document text
    • https://mfdesign.hu/files/file/fupavupes.pdfIn PDF document text
    • https://festival.bg/fckeditorfiles/file/zomusojimozonu.pdfIn PDF document text
    • https://sbufficio.it/file/76259034783.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/77btjvnjrespp932e1lci15l33/kisaxowoje.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16084b8043b4c4---21206780514.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/rivesa.pdfIn PDF document text
    • http://maekalocal.com/Maeka/UserFiles/File/627310563.pdfIn PDF document text
    • https://autopratichesas.it/file/61606509075.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/90bf0d244947e080054febddd4147863/52971505498.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_off000103f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F8 10480 bytes
SHA-256: c0e6bdb7dbc3e25788245971c3fd7ffe0734c22afb79d670da2ac62f5c3c4563
font_01_sfnt_off00011bbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BBC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000133ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133CE 17556 bytes
SHA-256: 9bbbf46fdbd04027966d9eada2596ce1fd9f59755519646f577b7ffabd9b92bc

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