Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e786bfadec3706…

MALICIOUS

PDF

62.1 KB Created: 2020-11-16 20:48:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2758edb7af9de0039ab83bf248c8805e SHA-1: 57128da4ae825ee8b392ab5b8487c1d87e27f899 SHA-256: d7e786bfadec3706ef6e2270eef41bf1a57214166c0da7aa66031fa4bcb59cc7
164 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffe.ru/strik?utm_term=the+mughal+empire+in+india+worksheet PDF link annotation
    • https://ravadekivis.weebly.com/uploads/1/3/4/5/134512786/luxobokelire.pdfIn PDF document text
    • https://rulomegujenuguv.weebly.com/uploads/1/3/4/3/134329868/514fd12f43ec.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/mufukep/jukilifatajalafi.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/5th_symphony_beethoven.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/a_programmer_s_introduction_to_mathematics_github.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65fa5877-4d1d-4d3c-bbb2-a120275d4d96/how_to_use_rem_bot_discord.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/article_in_english_newspaper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e85f890-212a-4f85-aed4-095ea64b38be/de_de_pyar_de_full_movie_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/petovojurofeje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a04fb902-059f-4f86-b3bd-e32409ac89fc/super_mario_all_stars_with_super_mar.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/dutamedas.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/fundamentals_of_experimental_design_pogil_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3210ca84-7b08-46fb-92ee-8f121bd34f01/zukagomimadudumig.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/watch_wrestling_bellator.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_off0000b55c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB55C 5476 bytes
SHA-256: a614f3d527fb6b639715f6e12e89cbc7354f7f727e35081f612fe702af842775
font_01_sfnt_off0000c7e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E1 11000 bytes
SHA-256: 4ae5c42d5af8c141e3682fad162b57e5405e43c5fdc929a90ee602d5a1d785be

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