Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f2ced2b8135e94d…

MALICIOUS

PDF

76.2 KB Created: 2021-05-24 23:05:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: cb03bfdb18f1c13ade81b993514e8b26 SHA-1: b1409eb64ebcf89775c90105bd5f3ebdfde2c958 SHA-256: 5f2ced2b8135e94d0dd8398f534c6beea7f0b5687ef8d638f4c9ffbf90e3d646
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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/strik?utm_term=how+to+read+electrical+panel+wiring+diagram PDF link annotation
    • https://boxatikavizag.weebly.com/uploads/1/3/4/6/134680825/kanilat.pdfIn PDF document text
    • https://jupufafel.weebly.com/uploads/1/3/2/7/132740723/kigitoteri-godopumo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461786/normal_600aa79ece618.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368740/normal_5ffd49a140661.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://s3.amazonaws.com/puretulenuza/bell_fibe_tv_remote_user_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91775b0e-4a18-49ec-bfc4-8a3391c16ead/xizibuv.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/witovotukuri.pdfIn PDF document text
    • https://s3.amazonaws.com/borokegujuzero/astrologian_guide_ffxiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6202254-4910-44d6-9c54-7177ee16f7c5/roduxokidonafobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfe4c4dd-50c2-4da5-bb70-1d814cad44f2/how_to_reprogram_directv_remote_to_receiver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d71b397-0cfe-460e-b302-a0f779848b63/gakirivozude.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26a29355-2c41-4e57-a08b-0dc3aea4568e/64419815875.pdfIn PDF document text
    • https://s3.amazonaws.com/dexodekelaseki/how_to_assemble_a_rival_meat_slicer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/444ce0ba-97e5-4b09-bd11-b1a6d6f11ed9/how_to_become_mcs_certified.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/battlefront_2_xbox_dlc.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/51690543262.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e213a43-7b44-4280-9810-f1d35a347032/delipepakaxusiwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb546503-65cc-4e7b-89a9-e1a66ffd6913/jbl_flip_3_waterproof_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2290aeeb-2d29-45ed-ac71-4464ba48b696/betuwutolabuxizegu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d21380b-1cad-427f-b01e-729a802640cd/us_history_timeline_worksheet.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_off0000e1f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F6 5056 bytes
SHA-256: 617db5764262bef93f369e6d2f71ecf2cb5cc9263437e85f860154b9c9cc86d8
font_01_sfnt_off0000f318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF318 9920 bytes
SHA-256: 3e5781a2b3b1b287cdca4676b9caf23bdff07255f3260c4c5c7199617024a342
font_02_sfnt_off00011510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11510 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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