Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bfefb190c5aaf3e…

MALICIOUS

PDF

77.1 KB Created: 2021-04-02 09:10:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 17863cfeaf4377be7a9b3352c21a3f61 SHA-1: 5ad281013d0962afed137d1074248f2da8bf0021 SHA-256: 2bfefb190c5aaf3ee69ed5174f724dc18a9605aa9b21ea229b698b0919b27c37
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://pelibifir.ru/strik?utm_term=universidad+del+tolima+especializacion+en+medicina+estetica PDF link annotation
    • https://cdn.sqhk.co/lexebogefaj/f5yibjd/sofijobezatamodunugu.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizilo/JFiahfF/reversionary_estate_lease.pdfIn PDF document text
    • https://cdn.sqhk.co/loxowopiv/Y2GQ6RE/league_of_legends_qiyana_probuilds.pdfIn PDF document text
    • https://cdn.sqhk.co/panosiritu/jeGjfJ3/english_songs_90_lyrics_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/zeputefilu/jje5LQP/the_walking_dead_season_10_midseason_finale_trailer.pdfIn PDF document text
    • https://tumazalewiguta.weebly.com/uploads/1/3/4/7/134755417/3702776.pdfIn PDF document text
    • https://cdn.sqhk.co/rubuxupab/iiggihh/speedtest_by_ookla_desktop_download.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/gjghwif/55782391761.pdfIn PDF document text
    • https://wamogipoko.weebly.com/uploads/1/3/0/7/130739383/6382562.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/cwicigD/padovexin.pdfIn PDF document text
    • https://cdn.sqhk.co/kavuluxaja/bP3hhRL/nuposerejeku.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://6c8ebe11-725c-420b-823a-68bc39d02ad2.filesusr.com/ugd/3e87bf_f8711e4562bf48b8857731b236911b96.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b619e90b-3451-4772-a41c-df71bf38cea9/kesobaxolix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a345ae00-f8a1-4374-8771-954961a2563c/high_school_chemistry_lab_report_format.pdfIn PDF document text
    • https://36535336-4f9e-4c0a-b1ad-3385cb5d4299.filesusr.com/ugd/15ebe2_a896f5d8bf6744229ea975ee269c265f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/geometric_transformation_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1975426e-21fe-4eac-8172-2e2c5a1f89fe/how_to_do_a_plan_and_design_lab_for_biology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4259d89a-dc8f-4b22-b382-111308230cc4/tukisonijo.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/wowhead_siege_of_boralus_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4969f7c6-0372-4822-a1f9-79ce9fdd6ed9/how_much_did_paige_vanzant_make_for_ufc_251.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_off0000dab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB6 5108 bytes
SHA-256: 2003b3649524e17e691d80a746792f3c6f52a90c0ebcbaa054da86283a7f06f8
font_01_sfnt_off0000ec03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC03 13180 bytes
SHA-256: ba7a88f7bb08636dd4e3a2c931d91450aa493161dfca2b2e2119061f6ff1924e
font_02_sfnt_off000116a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A0 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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