Malicious PDF — malware analysis report

Static analysis result for SHA-256 20e792b57f415a39…

MALICIOUS

PDF

116.6 KB Created: 2021-07-17 19:51:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: efa94c659793cf07fc5d6cab2c30ad48 SHA-1: e4e534d6cf814ff625346d3342950cfc0ae2f4c9 SHA-256: 20e792b57f415a39d8d314715b681507058fff4d5729536685c49c186accdd76
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, indicating a link farm or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://hotechike.com/files/files/ginegebusi.pdf In PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/j6toivpk3hsprg7rohnbo4oq4v/lelapawopepeve.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/vq5q8s2l4a2a3o7mdt67396t4m/galixirizoride.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/79341527138d7bb8db729b87f5a009e3/67516861371.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/c3561c2157d77c41b7f3f40ca321b8ab/14294665421.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e56d1a94f81---rixapatolixevekujenoja.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/cbff96bf06d10f11c253e444686ebd8f/30145830060.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af8d6b59d31---71400593519.pdfIn PDF document text
    • http://mingzhicc.com/userfiles/files/sulolepo.pdfIn PDF document text
    • https://ikitellirezistans.com/upload/files/vogeligafesodizofabebidi.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/eafca788acf7f760c490a39bc688b7c2/5694536711.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/54539779394.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/tllrn9pbtmucq68p72328ounec/38271507363.pdfIn PDF document text
    • http://memsports.com.br/admin/libs/ckeditor/ckfinder/files/govex.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/nemasopafesexo.pdfIn PDF document text
    • https://castilloexterior.net/ckfinder/userfiles/files/lugujojimepejituberes.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160763c8da55d3---jujefedasi.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1608cad855738f---50987227080.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160764bde4a2e7---29490439667.pdfIn PDF document text
    • http://tehnicgaz.eu/files/file/52950337697.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/127778596529c733cbc99b380d319018/mikutekafulawufe.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/86519651563.pdfIn PDF document text
    • http://vksraja.in/fckeditor/upload/file/5285158679.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=call+of+duty+cold+war+easter+egg+guidePDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000162b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162B3 18068 bytes
SHA-256: 350ce2e6314f21d1b1d2e1da5bf20d4b5c5afd6f0aa16e9897735ceeaf832e0c
font_02_sfnt_off000191f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x191F1 10880 bytes
SHA-256: 7c2924773805b2f8e97592826ec03c33f972baba51d24d3c1e1fc45e76d0cc4a
font_03_sfnt_off0001ab2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB2A 17248 bytes
SHA-256: 995cce2337fe2ab42a96c59fe77aa998abed167e6719bfa758456d8a79d486ac

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