Malicious PDF — malware analysis report

Static analysis result for SHA-256 bde3aef1914c962b…

MALICIOUS

PDF

82.6 KB Created: 2021-03-08 02:58:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8f019c5ecb02021a569f18d05b2d37e9 SHA-1: d66d6ae71e3d78038bc87f7644ce0505a2739296 SHA-256: bde3aef1914c962ba7ad7c520a9aafa5437a694834fc61b06a004a30cdbdbbf9
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 0.9998

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 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/wix?keyword=ohio+board+of+cosmetology+license+lookup PDF link annotation
    • https://cdn.sqhk.co/mewixamok/ih0hjJa/sibanibexelesifejusudada.pdfIn PDF document text
    • https://cdn.sqhk.co/budotedo/UhfsYhj/xesopi.pdfIn PDF document text
    • https://cdn.sqhk.co/vasinabew/iajbijE/oxygen_sensor_car_stalling.pdfIn PDF document text
    • https://cdn.sqhk.co/satasevubu/Rifhiig/sogugugu.pdfIn PDF document text
    • https://cdn.sqhk.co/figegixo/njbaTVR/galosubibaturudu.pdfIn PDF document text
    • https://cdn.sqhk.co/tobepeliv/hhajhgg/empires_and_allies_auf_pc_spielen.pdfIn PDF document text
    • https://cdn.sqhk.co/woxemumi/hcUiajh/ruzorow.pdfIn PDF document text
    • https://cdn.sqhk.co/medujebukoma/GhjaI4w/red_ball_3_game_y8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/37e8fe33-bc1c-4a5d-9ebc-7426828f188a/34005816620.pdfIn PDF document text
    • https://37e0f79d-b0c1-4727-b76d-5b759c81288f.filesusr.com/ugd/9c66ff_9a6cd230991f41c0874e56e10fe8787c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/class_9-_10_chemistry_book.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/lagu_kisah_cinta_kita_planetlagu.pdfIn PDF document text
    • https://835a0401-7144-467e-aacc-710587930ffc.filesusr.com/ugd/432cba_7a6128ca84e24d6c89ed9e6d38a7961c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/polexebuj/can_gamestop_fix_my_2ds.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/tebodezifunivomibure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6ecfb51-bde4-45f0-a737-5bf7844b0d68/bumupiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5db4673b-7e0f-479c-ba6e-44a522d03991/64007233544.pdfIn PDF document text
    • https://0ea1ff7f-05b3-43a2-9744-178351a05ed1.filesusr.com/ugd/01f9b9_35564bf140704d9ebdec69bfc99f18f8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c34f8253-b97c-4e19-ad7d-bb60abf271a9/pe770_brother_embroidery_machine_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/75577470363.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_off0001040a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040A 5904 bytes
SHA-256: 7504fdda350c4bffa02bc5924772f74b38dc2b76c350dce37d545754984677d6
font_01_sfnt_off000117f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F9 10844 bytes
SHA-256: f4fa090a55fd6f5f39d9dba8fcbe0a469bc25f3d29d5838a61f935b1edc8b65d

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