Malicious PDF — malware analysis report

Static analysis result for SHA-256 d42893b2cef7b3e3…

MALICIOUS

PDF

88.0 KB Created: 2021-09-07 08:55:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e94dbe1e51a547defdd9deb34c44f313 SHA-1: f9b385dcce833b96095f07a3c118c84bb4d6a274 SHA-256: d42893b2cef7b3e39cfd500809fba7db4bf63b3fb52ec7311bf41bb1c986269a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous URLs pointing to various websites, many of which appear to be compromised WordPress installations or disposable hosting. The ML classifier also strongly indicated maliciousness. The primary purpose appears to be directing users to potentially harmful content, consistent with phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://philabc.ru/uplcv?utm_term=thermoplastics+and+thermosetting+pdf PDF link annotation
    • http://topenglish.sk/app/webroot/gallery/files/baniro.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/ff0279df88940b2c9df8a2c932751d2c/7793758711.pdfIn PDF document text
    • https://clickkedai.com/userfiles/file/57974558135.pdfIn PDF document text
    • https://projetovm.com/uploads/files/bowebubabawuwamozo.pdfIn PDF document text
    • http://sweethomedelivery.com/ckeditor/ckfinder/core/connector/php/uploads/files/52529847541.pdfIn PDF document text
    • http://luisacortesearchitetto.it/userfiles/files/90050818793.pdfIn PDF document text
    • http://wittymall.com/multimedia/userfiles/file/begepufowebakusovitoje.pdfIn PDF document text
    • https://gbagencement.fr/uploads/file/27071143555.pdfIn PDF document text
    • https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/5e9d926478d4bcced2c01685ef1b98ca/52367656111.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/beb037ee82bf38b715441ae722193a13/31746616560.pdfIn PDF document text
    • http://mudrkanuch.sk/editor_uploads/system/files/jotunesuwewumiwi.pdfIn PDF document text
    • https://gannat-ltd.com/userfiles/file/sowagapukigumavegunoneje.pdfIn PDF document text
    • http://www.ctnphrae.com/ckfinder/userfiles/files/wezubodoroxokakemibil.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e99f452cb1---74985587071.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/latepixa.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eca05986f65---xuzozu.pdfIn PDF document text
    • https://bahamianbrewery.com/ckfinder/userfiles/files/18844016577.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/b3dbb7d6d118c1491d55a0cc9456d05a/62131287619.pdfIn PDF document text
    • https://citytrafik.nu/images/file/segoxapufufavedowu.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/93988746753.pdfIn PDF document text
    • http://zae.me/datafiles/file/70892947884.pdfIn PDF document text
    • http://krukewittfarms.com/userfiles/file/79385138977.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_off0000f4f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D0E 11028 bytes
SHA-256: 165de41bd0cc67117149a354922e234579be5ffcdca89b74d4a7fc3b3fee6020
font_02_sfnt_off0001264c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1264C 17116 bytes
SHA-256: 04780ee7b0d4e24deef52178cd9575289e56acbcc7112c0b870ad5be31949cac

Open this report in the interactive analyzer, or submit your own file for analysis.