Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfee28d8a009eef2…

MALICIOUS

PDF

78.3 KB Created: 2021-05-25 19:59:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 003a0ce6ab1c89ea4a53e4b3064a886e SHA-1: 16795bcb192e0b4aeb0485eda4bc0e8b83f05990 SHA-256: cfee28d8a009eef240117c0ba0a30e59e420c2bbaa2e2476addd13bf6a68c2b2
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 0.9996

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://botokaw.ru/strik?utm_term=assamese+remix+song+2019+download PDF link annotation
    • https://wubepifumemav.weebly.com/uploads/1/3/4/1/134109226/wejigoka.pdfIn PDF document text
    • https://janepaxe.weebly.com/uploads/1/3/4/0/134097288/105b424d0f7.pdfIn PDF document text
    • https://javekekowunafot.weebly.com/uploads/1/3/5/3/135324960/9458830.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/107652ee-c12a-487b-b84b-f4f888be694c/2003_ford_focus_zx3_tire_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e4eb877-7d96-45f3-aa74-a97695635f4e/14146219265.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b42dc24-af47-4f1a-85cc-e772fb40db74/taylor_gs_mini_for_sale_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/293143be-b8c1-461d-acca-05326186af7f/specialised_cells_worksheet_ks3_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd598b18-90d2-4282-ad79-8e25fc82b90f/85749142660.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dc1cf24-09f5-425f-a291-7f811907c297/zefubuguv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aac5320-094c-44ba-bc63-6d490ed58fc2/musesibalewuridipuxikiwas.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/firuzilexuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50af0a42-67ad-4a77-9738-d69fcd984d44/lazarillo_de_tormes_english_translation.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/situl.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/how_do_i_fix_my_washer_that_is_off_balance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/409c41f8-1ac0-4dd4-8966-58c48f93d410/how_to_get_lean_body_in_3_months.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5520fc8-dbd2-48c6-a4f5-267534947de7/mafitufuwar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d32e52c-3130-4202-9525-d6167437d430/21530884034.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/nupexulizuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40848193-ca80-4c9a-8f27-c0730b7abf3b/vivawojunajegedibajaxijef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8ffb48b-c28a-43ed-ad2f-a8cab0f64e1d/481589686.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eaadcdb-f570-4e16-8093-4de469372611/41472624951.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_off0000f2ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CE 5776 bytes
SHA-256: 95ef1a8521573722d3247e32de7f066c88e936ac6ff87fe11b7b149d242cfb95
font_01_sfnt_off0001067f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067F 10900 bytes
SHA-256: 7a95a1eadf4bdbe1d72b2f7c88a002cff67d041e250bd7833f33a00b76a996e3

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