Malicious PDF — malware analysis report

Static analysis result for SHA-256 45e8e3909eda32b9…

MALICIOUS

PDF

95.5 KB Created: 2021-04-01 00:54:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 057fb0cd99f6cf56a5d06c626efd9b71 SHA-1: f5a077b8d7a89856ea9b5b4a45e44fa5d5ab9c36 SHA-256: 45e8e3909eda32b954bcdbba98f117e65ba0bfd64b2456d8b0fd6faa12c57aa8
194 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, suggesting it functions as a link farm designed to redirect users to potentially harmful content, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The presence of a download button lure further supports a phishing or redirection-based attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://soxebez.ru/wix?keyword=geometry+unit+2+assessment+answers PDF link annotation
    • https://cdn.sqhk.co/sutazojawote/ldhhb2s/dwarf_legend_mtg.pdfIn PDF document text
    • https://cdn.sqhk.co/tuforalogidu/jb0ogen/7310217536.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuvubawo/ihXifsn/94338631867.pdfIn PDF document text
    • https://cdn.sqhk.co/tinodifozeza/h1PQS4e/screen_stream_mirroring_pro_apk_latest.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a015ba4c-39f0-4354-9d70-a3d19a3b546b/74911489278.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9be83d5-cbba-4021-a449-ad7d9103ced2/xirexoxinoboje.pdfIn PDF document text
    • http://kazixovo.rf.gd/mogekijevixuxojikebupok.pdfIn PDF document text
    • http://lowefukoxoxegab.epizy.com/54469347952.pdfIn PDF document text
    • https://3a00e800-a8eb-44ae-aafc-ae9aecab8e06.filesusr.com/ugd/1715bf_91319f6a856e4d588d076ad4a6a862b8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffd21aeb-2a55-41a9-a3cd-643d2912649b/sewidoxuxeworewuw.pdfIn PDF document text
    • https://ff5ab256-a407-4697-91b9-141751226614.filesusr.com/ugd/4205e4_c925e890a32649eb83c72a6635a91a4c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e3238df-ec00-48a0-a50b-9ce5c359e452/wivupisalilula.pdfIn PDF document text
    • https://e114ad41-1367-46fe-a5fd-427bf640f69d.filesusr.com/ugd/a63c55_4f487f26c21840edb4f69431f57e03ed.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a346b42-20c5-44fb-887d-2ff03dc11728/xbox_360_controller_work_on_xbox_one_x_enhanced.pdfIn PDF document text
    • http://zatugawaxevi.rf.gd/zalubogimiwesogagibit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcd04fb0-3bd2-4d55-b9e5-b9b6f43004f4/manual_of_section.pdfIn PDF document text
    • http://xunaruxu.rf.gd/frette_hotel_classic_sheet_set.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8c02643-dd5d-4d11-a261-af35dcc2b4cb/what_embroidery_machine_is_best_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0991aac-b309-44a7-b413-41c1dfb11b53/scout_log_book_in_sinhala.pdfIn PDF document text
    • https://s3.amazonaws.com/gimufesajo/50561912461.pdfIn PDF document text
    • https://b913155d-2712-4fd4-bcc6-651970a8c456.filesusr.com/ugd/e39924_af212b4929ae48c2a9534aa74e8ecfd8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a659130-6738-49aa-8f0e-97608c7bf3aa/jack_and_the_beanstalk_book_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eb35c7f-e5ab-4cd4-b074-8b3e023b8288/how_to_use_bible_in_propresenter_7.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/38093192141.pdfIn PDF document text
    • https://ef9d90ca-5811-4a1c-810e-75bcfae60121.filesusr.com/ugd/a33af7_e12a37a3edd6497bb34c9041deea93b1.pdf?index=trueIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001192a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1192A 1656 bytes
SHA-256: dcafc6193900557fbd52e1e98f9067de3c4b215078778c9cc4c41c9251efaa5d
font_01_sfnt_off00012138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12138 3060 bytes
SHA-256: 860e1857ab2a50f7a06de40382fc6e5f199f13285f7e6df26b0d57e52cfa6dda
font_02_sfnt_off00012c32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C32 5156 bytes
SHA-256: ddd4667d290ec0343029740c84e633863199d5d1088e61e0045772f35e80f393
font_03_sfnt_off00013dbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DBB 17148 bytes
SHA-256: e9d5d86d882bdc68b3a3bbc016c5425a1796d8d35e450cd6c561e382b62528cb

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