Malicious PDF — malware analysis report

Static analysis result for SHA-256 cac058db124c9b6d…

MALICIOUS

PDF

109.5 KB Created: 2021-06-08 17:36:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 50731616e123c28af3479d09d11d91f8 SHA-1: 7c498d56fc0be67a12279aaa86a5d6e5a1135fe6 SHA-256: cac058db124c9b6dd57e69fd7df1a20560354c6d0a4ba697adf40d26c00392b4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file exhibits characteristics of a phishing or malware distribution lure, as indicated by the ML classifier and ClamAV detection. It functions as a link farm, directing users to various URLs, some of which are hosted on compromised WordPress sites. The presence of 'utm_term' parameters suggests an attempt to track user engagement with these lures, potentially leading to further malicious content or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 https://pistant.ru/uplcv?utm_term=bhagavad+gita+pdf+marathi+download PDF link annotation
    • http://faw-asia.com/image/upload/files/64648222866.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/2baa6b77c80dd672debe08e5000d2748/46868619996.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/7ef58adc38e2b9ed1f8045e106c0f977/49638199465.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/a54e27b96e83963f3c5675f3671aed48/jotujo.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/jiwunavafapawo.pdfIn PDF document text
    • http://sequirk.ie/userfiles/file/82364508463.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071e9aa66b22---81856128905.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/2a6c51a2479bec4bc84d63d74617070a/4664106882.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/8e54051ded012827a28785ae04fd10b7/36813062277.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/19250843576.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ac114bf36d8---34958333374.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/gbd65ah8ogdhoq100bjtk0gbh6/jolasiguxusuribipew.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/372hfmgal3gjbh2j9gttmfa896/kodizusisunuxopiluwos.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/nuue0tc48urhintqa1n3pfe5l5/tebebobojegosedulugokod.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/55564046621.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/3c687c3c62dabdfd28f9d1b6a0fd1ed6/lubisudonipijedep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.orgThisIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn 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://scripts.sil.org/OFLIn PDF document text
    • http://scripts.sil.org/In PDF document text
    • http://scripts.sil.org/OFLAbyssinicaIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CB 5148 bytes
SHA-256: 4758cad3d1e92ec53378d0b093b114b8b39bd616d0b6636339422582e0b6801a
font_01_sfnt_off00010339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10339 26364 bytes
SHA-256: 777bdc805fd1dd9813aaec13d8f85bfc6920ba624611eabb27b7e6b604b39685
font_02_sfnt_off00012f56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F56 8756 bytes
SHA-256: d70c3a244ef4fb5be96513b72ef8772948e65ffdd43a9582aa5ac26179badce2
font_03_sfnt_off00014ede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EDE 11276 bytes
SHA-256: 6febe1cfc775866240f7452c9942f75961a63a8cc90e55e32267d74cff60fdb6
font_04_sfnt_off0001757c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1757C 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
font_05_sfnt_off0001837d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1837D 11096 bytes
SHA-256: 2493ee296cf297103f9601e4a27f869f1286a4039c4cf63a44e5743a9b2380b8

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