Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ba6f61fe3c3fd0a…

MALICIOUS

PDF

82.4 KB Created: 2021-05-30 00:41:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1abc348c66894405a32b1e0eb7d7bee3 SHA-1: 1a0996b6fd664fd61072b4d8db69b1dfe005bf8f SHA-256: 2ba6f61fe3c3fd0a23f678fa402d2a61858a4e7e68e32d3d2774e21a1be6c3de
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jacksth.ru/strik?utm_term=what+is+the+humanistic+approach+in+therapy PDF link annotation
    • https://benaputilog.weebly.com/uploads/1/3/4/7/134707665/1077713.pdfIn PDF document text
    • https://rimidewazasi.weebly.com/uploads/1/3/4/3/134317879/zaxaxobizevapiz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371786/normal_5ff6585f6c5f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501963/normal_5fc5a99e47ecf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474997/normal_601bcc1cd11a2.pdfIn PDF document text
    • https://vorujefam.weebly.com/uploads/1/3/4/3/134322124/baretikagesisuwavowi.pdfIn PDF document text
    • https://tapojofam.weebly.com/uploads/1/3/4/5/134518610/tugadonosutog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/f5804bd9-56b8-463e-9fdc-de059c662d88/ramotigudefoxanizafugiwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9bfa1e5-7d61-4300-9635-36e1296bd888/79879376260.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a5c1f97-c4af-4424-b73f-09f89fefc6fc/duromax_xp4850eh_dual_fuel_generator_green.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54e5838b-7744-4ebe-a7f7-19756ef02949/object_oriented_programming_definition_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ff0728d-2495-4bab-8ec1-dae8bde1fca1/xugibobuza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da4f00d5-220d-4d98-b24d-ae943fa5456f/bissell_power_steamer_powerbrush_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48d20266-d334-4ace-9d17-378ffa531e6e/tekepu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bec281aa-eb09-4dec-a47e-39fffddafda2/86024148431.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c464857-15f5-43bf-87f5-6cd3b6e2dacb/87280866803.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32de2e5a-4bb8-4cc4-a9c9-4bbf9ed35a7f/daily_schedule_template_docs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27194f25-ecd8-4829-89ce-e703bbbf8d24/how_to_do_scientific_research_in_high_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/838ed274-4e3d-4d00-9866-33bdfde57f82/80895374721.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF947 5136 bytes
SHA-256: 4b5b71dd8f9c46c45d0f90f02605f35d5ff11b7bfb7f3622e0bc301c1888b13d
font_01_sfnt_off00010a9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9D 10356 bytes
SHA-256: 322bacad1612cc5a9bb296f684ad889a04faf5d74a4674643e0d316b53a85109
font_02_sfnt_off00012e13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E13 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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