Malicious PDF — malware analysis report

Static analysis result for SHA-256 1140ac1bb5bbfd82…

MALICIOUS

PDF

73.9 KB Created: 2021-05-18 15:42:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7adb6f2e5139f70eb0860e372c650ad6 SHA-1: 5efd0bd62e062ee9059f52033bab306f1b2f0c06 SHA-256: 1140ac1bb5bbfd820b20f05fc8f16d5b0e74313b5a2e30f212c24eef2a7dc65b
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 0.9990

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://vilenefex.ru/strik?utm_term=audi+a6+owners+manual+2017 PDF link annotation
    • https://rorumelet.weebly.com/uploads/1/3/5/9/135969221/1491071.pdfIn PDF document text
    • https://povizizumor.weebly.com/uploads/1/3/4/6/134636509/09e1c0bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388617/normal_60445c4d93151.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455178/normal_600a21fd92972.pdfIn PDF document text
    • http://gozatelaji.22web.org/aggiornamento_ios_10._3_3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382948/normal_6010c6de49e63.pdfIn PDF document text
    • http://sewutaf.iblogger.org/97575941970.pdfIn PDF document text
    • http://zemixubekuj.22web.org/aws_certified_solutions_architect_study_guide_associate_saa_c01_exam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379038/normal_604cb7a4baa3d.pdfIn PDF document text
    • https://gosibipidumoduj.weebly.com/uploads/1/3/4/3/134318513/sodasokugiza-dogijixopufere-lukuzalegov-nifuzexuboka.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/nilafafakem/rosujabaxitagirumazom.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/napuwuweb.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/83521262800.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/screen_calibration_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/tatedejavi.pdfIn PDF document text
    • http://wofelekupobepo.epizy.com/california_immunization_registry_form.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/thirteen_reasons_why_jay_asher_zusammenfassung.pdfIn PDF document text
    • http://fibogexexagiram.rf.gd/42878759974.pdfIn PDF document text
    • http://sewegex.epizy.com/bioplastik_kulit_pisang.pdfIn PDF document text
    • http://radagosedapisat.epizy.com/cavaleiros_dos_zodiacos_omega_dublado.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/football_manager_2019_transfer_update.pdfIn PDF document text
    • http://bubezowi.epizy.com/zasuta.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/addams_family_values_snes_rom.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_off0000d6ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FF 5416 bytes
SHA-256: 7801bd2cb7f07b3edb46302c4b8a0970dfb0cadbdf03ed0e2bd64d47669af1c5
font_01_sfnt_off0000e956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE956 10020 bytes
SHA-256: f10ed9203c5742e69d62b0e37d57f77cf3eea251aac7638fd664c69b2fb38690
font_02_sfnt_off00010b73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B73 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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