Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7eb572e44f52c9c…

MALICIOUS

PDF

81.3 KB Created: 2021-03-18 06:27:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b233becf3ea4bab4903eef94cc50d6bd SHA-1: 5b8913610e064a6b39bde01608e2d8932d5331b4 SHA-256: c7eb572e44f52c9cff8a3a1f77e8043839a3a8debbe09abbc726dca5391dff28
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/123?utm_term=movimiento+circular+uniforme+concepto PDF link annotation
    • https://cdn.sqhk.co/dulunukosep/awtgg5n/jugular_foramen_syndrome.pdfIn PDF document text
    • https://cdn.sqhk.co/zolulesar/gficwjd/is_amazon_music_included_with_prime_student.pdfIn PDF document text
    • http://riforemepenog.iblogger.org/32276517405.pdfIn PDF document text
    • https://cdn.sqhk.co/webutemup/bjcHji6/fibudedusugefowoxazux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379841/normal_600b3cd04f29f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471948/normal_602c3ab041161.pdfIn PDF document text
    • http://nuwiratuzitezep.22web.org/ikea_brusali_wardrobe_assembly_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418385/normal_603e85c89c458.pdfIn PDF document text
    • http://jenupekob.iblogger.org/99668637534.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvupewog/Jha7g1P/bijupuvubimi.pdfIn PDF document text
    • https://cdn.sqhk.co/simikimira/dSdLeYo/billie_eilish_merch_h_m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421464/normal_60175d184b5d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483349/normal_5ff5e2cf8d34e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sogivuwe.onlinewebshop.net/medieval_2_total_war_units_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e13254f-3d7c-48b1-b8c6-42fcf69e99aa/2850378065.pdfIn PDF document text
    • http://xowobovu.myartsonline.com/70225206813.pdfIn PDF document text
    • http://xilibosukotijob.epizy.com/69637753190.pdfIn PDF document text
    • http://vorisenunajix.myartsonline.com/lurakakafosav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bd40ddd-510e-40c7-ac02-b9d9dbf7e48c/skywalker_trampolines_14-foot_trampoline_with_wind_stakes_blue_weight_limit.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE785 5048 bytes
SHA-256: dcd66e5a70ddbcddfb63784269802cac2a04c40275ec46844a46f81e0a38c2f9
font_01_sfnt_off0000f8b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B4 12140 bytes
SHA-256: 7f105f649ce35e1c0550e82d9d70d1774fda1668a58a56c0bf283a196691158d
font_02_sfnt_off000120bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120BD 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

Open this report in the interactive analyzer, or submit your own file for analysis.