Malicious PDF — malware analysis report

Static analysis result for SHA-256 f04ca86a21733e15…

MALICIOUS

PDF

83.5 KB Created: 2021-04-28 00:25:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f0e3be560ad3d4bb0a6ebe489e4f4c6 SHA-1: 20307da056328799b333253a7ef86b272b43b540 SHA-256: f04ca86a21733e1542b44ef1d8ef8cd22f091edbea2b2eed951c538bdf212b77
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, some pointing to suspicious PDF files hosted on compromised websites, suggests a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which could be used to facilitate the download of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/jcb2q8rmcqjpmdi0982jnb37md/60759525705.pdf
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e80842f6da---23590440545.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606da255dd748---bagireritoradufafoveveneb.pdf
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/s79l8qj0te1pahgaud1qrpf34l/nesol.pdf
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608434e78c741---50399357594.pdf
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082362963e10---27278190166.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e0bbd04a1---luzage.pdf
    • http://akcjonariusz.com/UserFiles/file/lerikelolefolanojavo.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607c071520e04---pomidefalukezo.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/65c2d2a0f81d6040860dae95bd3c01dd/37872888481.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085d5b9ecb4b---bawebosenefopobad.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/4a4160097b305e88d59521b9269dae5f/gogekaxatisevuno.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606e4b90afeb1---tomesokubederul.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6c2ad2cc2---pilubojogurus.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160783b74f1383---27601453847.pdf
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/5075313bfbf0c0466d3ec839c3709070/43409299429.pdf
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/16080d20743cf1---20262967180.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160776bf132531---40261467040.pdf
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8c3902d5f---87275958238.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=panchatantra+picture+stories+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea12.bin
6a8ff5eda9459985a0f95a6f7d07cf2a646e9a9d7b1e99c245999bd5ab24954f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA12 5212 bytes
font_01_sfnt_off0000fbbc.bin
ee967336568f77ff61a5ae04097864f25fb24cf77b94457ab20e22408cc95c1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBC 2252 bytes
font_02_sfnt_off00010524.bin
c810dfad050629c66abff197e55c5f8c9c537dff55d81b6eceb3f208d8d9e720		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10524 10956 bytes
font_03_sfnt_off00012a8f.bin
9c47a8ecf7103172530608de19fa11afb8a035ab51042e9cb8c6809f09ebb189		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A8F 16344 bytes

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