Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cdcbd0dd2526a7f…

MALICIOUS

PDF

86.2 KB Created: 2021-04-22 00:58:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8d29b7e70343ddbd95751976603e5246 SHA-1: 95c7f2f803c501f43c5c636242bb2c1a2741fb35 SHA-256: 6cdcbd0dd2526a7f3604e8dce8fa18729e3c0bbc073cec865c28522e1cd28023
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://druttle.ru/strik?utm_term=1+nephi+19+9 PDF link annotation
    • https://poxapoxidofex.weebly.com/uploads/1/3/4/0/134016688/7250219.pdfIn PDF document text
    • https://baxufolodamiz.weebly.com/uploads/1/3/1/4/131408032/wezafagipalorizad.pdfIn PDF document text
    • https://cdn.sqhk.co/vorebilifi/b8iibhi/star_wars_galaxy_map_old_republic.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/fxmU6L4/4_pics_one_word_game_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/FPVwLgg/muwedezipoteru.pdfIn PDF document text
    • https://lisogawe.weebly.com/uploads/1/3/5/3/135312855/9935227.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/piradi/applied_multivariate_research.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/gujetamamasupimiwepeb.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/68630263423.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2877eab2-fffc-4601-8217-6aea57029282/notijiranif.pdfIn PDF document text
    • https://s3.amazonaws.com/goveruduzewoxu/xukipival.pdfIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/1079137964.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/66998139582.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/rudagipiguzunomasi.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/wojavexojagugimuke.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/livro_memrias_pstumas_de_brs_cubas_em.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac3c5fc7-5e99-4488-9e21-9e8e7a246fe4/figure_drawing_models_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/botines_con_plataforma_marypaz.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/12204073031.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/dadulu.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_off0001141a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1141A 4504 bytes
SHA-256: b40d08032f86e577fe37da208fa124d6adcaf07d71a3e3574df0114c3d457b0c
font_01_sfnt_off00012374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12374 11736 bytes
SHA-256: 09653462493dc69a42e9525389d3503cc3753750ddaae75fb9e8346af09b3cd5

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