Malicious PDF — malware analysis report

Static analysis result for SHA-256 517fbd5a364eb9bc…

MALICIOUS

PDF

85.9 KB Created: 2021-03-18 07:15:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e97cf7ff10bc9a71b68b724d1c99d207 SHA-1: 9acb29faa820aa83a971928a48abacd540f592d2 SHA-256: 517fbd5a364eb9bcb68979d0d8b4bde41389ede111662869aa04e1da7fd9b62e
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://xajibur.ru/123?utm_term=3d+car+builder PDF link annotation
    • http://waxawazurutane.22web.org/36217425578.pdfIn PDF document text
    • http://spacexfoundation.net/forgotten_realms_elminster_seriesfrjop.pdfIn PDF document text
    • http://sdfsdfsdf.shaketorch.com/canara_bank_pgdbf_notification.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412902/normal_605050de09710.pdfIn PDF document text
    • http://lnstagramcopyrightcenter.com/howard_marks_mr_nice1dn5j.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425784/normal_5fd0882ad101e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450336/normal_600de91056f0d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529977/normal_5fc9b16ba5724.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/tonemakopinibem/what_does_the_yellow_light_mean_on_a_george_foreman_grill.pdfIn PDF document text
    • http://jadupapobixe.epizy.com/what_are_the_five_languages_of_love.pdfIn PDF document text
    • https://s3.amazonaws.com/pigolo/2004_dodge_ram_1500_quad_cab_tire_size.pdfIn PDF document text
    • https://e6f9d1db-9bad-45ba-a188-0e8e378e8087.filesusr.com/ugd/99b222_8bd131799b784222a4dae6ab09ce2148.pdf?index=trueIn PDF document text
    • https://c2dbac7f-2075-4dc1-ad03-af0d0352bff2.filesusr.com/ugd/278743_0d0f29b166244710b4340ffe08aa1829.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/bubble_bobble_arcade_rom.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/zivexogazixarezadojukive.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/duplicate_data_in_excel_spreadsheet.pdfIn PDF document text
    • https://a44a9d9e-3ce9-422e-9b5d-83ef2d4925cb.filesusr.com/ugd/3234e9_7f83b3dba6d6422c82071bbbd595460a.pdf?index=trueIn PDF document text
    • https://eaae50f7-3b1c-4f1b-9b3c-e2a48377569d.filesusr.com/ugd/b96e41_88c1edf41609407f815a0b6c6e7a006e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/pool_pilot_digital_nano_plus_error_purify_off_check_flow.pdfIn PDF document text
    • http://fopopuwefepa.rf.gd/adapted_physical_education_national_standards_guide.pdfIn PDF document text
    • http://sonituzesubilit.epizy.com/96220595544.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/kk_fit_bulking_program_free.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/bissoy_answers_shah_ali.pdfIn PDF document text
    • https://599b09cd-7b6a-4758-94a3-08a08d316165.filesusr.com/ugd/628a76_4d52e72986024f9b96b0e6a2a92b895e.pdf?index=trueIn 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_off00010a5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5C 4964 bytes
SHA-256: a473006c7473eb8c70a27531c461f17fad62c4b954721cc2e17817c093e4f531
font_01_sfnt_off00011b3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B3D 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off000123cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123CB 11408 bytes
SHA-256: 646b2ac4e4a85dfc6363e1261c1971a317455667e90a175ead9ef0eb53798da7

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