Malicious PDF — malware analysis report

Static analysis result for SHA-256 d45215a08932b778…

MALICIOUS

PDF

65.8 KB Created: 2021-02-22 11:09:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b20ec3c11c2bbd4991aa479b93cba213 SHA-1: 5bc2fcc3c556efe7d4d7a4ff55e164f832bb5b27 SHA-256: d45215a08932b7783af0431c0e2668aef1cdbb29a7754868be02677fea03ef4d
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-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://druttle.ru/123?utm_term=yoga+anatomy+coloring+book+pdf PDF link annotation
    • https://rizofuruw.weebly.com/uploads/1/3/0/8/130873790/d813f5027.pdfIn PDF document text
    • https://cdn.sqhk.co/fozozumaj/jeKhaCs/94621844961.pdfIn PDF document text
    • https://judadumoxa.weebly.com/uploads/1/3/4/7/134718892/tujamaradevijujazuna.pdfIn PDF document text
    • https://pemilixip.weebly.com/uploads/1/3/5/3/135330450/dusojofa-gerib-zepitawuroluboz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393754/normal_5ff9575c20046.pdfIn PDF document text
    • https://cdn.sqhk.co/rivogigaweb/eXgdDBi/real_steel_world_robot_boxing_apk_data.pdfIn PDF document text
    • http://jaxebememapi.iblogger.org/rikawudenurifa.pdfIn PDF document text
    • https://cdn.sqhk.co/fakineduxafe/Fjdhfjj/zajupixerupimeno.pdfIn PDF document text
    • https://cdn.sqhk.co/zonurubo/HujdgiA/youtube_kids_movies_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377101/normal_5fc72b38f17c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403673/normal_6025c0b254225.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/banula/biology_gk_in_bengali.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/1006466700.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/bang_bang_hd_video_song_videoming.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/smartsheet_control_center_training.pdfIn PDF document text
    • http://pokanusoliviw.epizy.com/asvab_for_dummies_free_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/software_user_manual_template_latex.pdfIn PDF document text
    • http://dizogabage.rf.gd/39402470772.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/rovunegefabejek.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/python_datetime_parse_iso_format.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/best_1080p_movies_site.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2F5 5564 bytes
SHA-256: c3ea91641e87bd34b9c1163b9aabdbe51a830989635bf264336a58eafa32799a
font_01_sfnt_off0000d5db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5DB 10112 bytes
SHA-256: 9a8922d35cb197d023783992db639757d73789ba5fa98eddc0a2ab181cd63db9

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