Malicious PDF — malware analysis report

Static analysis result for SHA-256 eccf87b781910583…

MALICIOUS

PDF

66.5 KB Created: 2021-03-13 22:36:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fb8265375a52cfc368e07f7e975914a8 SHA-1: 9b17cdc089c1612638907fc2a26e2f335ebf195e SHA-256: eccf87b781910583df1b13a2d051c4d4520231b21cab8f2553a3a9e2621129cd
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-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://dugedepap.ru/strik?utm_term=samsung+scx-3405w+driver+mac PDF link annotation
    • https://jebopisozezir.weebly.com/uploads/1/3/0/7/130739828/2904036.pdfIn PDF document text
    • https://cdn.sqhk.co/pigexebobe/eoiajc4/step_by_step_magic_snake_36_piece_shapes.pdfIn PDF document text
    • https://cdn.sqhk.co/nanagajog/jiihjge/creative_brochure_design_templates.pdfIn PDF document text
    • https://polalakenasi.weebly.com/uploads/1/3/0/8/130813885/f8821f.pdfIn PDF document text
    • https://cdn.sqhk.co/dutudovajud/gfK7fib/history_of_religious_christmas_carols.pdfIn PDF document text
    • https://cdn.sqhk.co/vilitemeru/QCiaggo/tap_dance_lessons_for_beginners_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/bamebuxi/ijPcC0M/jababogulo.pdfIn PDF document text
    • https://cdn.sqhk.co/gixenako/hegfijn/tamil_love_ringtones_2019_download_mp3_masstamilan.pdfIn PDF document text
    • https://fejaxipanegis.weebly.com/uploads/1/3/2/7/132712099/femalowuxawoxaw.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/kakef/bangla_video_song_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85a1be78-6e02-4da0-850c-4db02f7c7362/67094096010.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/17960973480.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dffb5d1-940f-4d17-b22d-181ede010388/ryobi_miter_saw_7_1_4_home_depot.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/basic_of_c_programming_language.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/27101667675.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/ketorivejajid.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/biology_book_class_12_cbse.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/45385523882.pdfIn PDF document text
    • https://s3.amazonaws.com/dafumuxitupav/guess_how_much_i_love_you_book.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/dantes_inferno_gameplay_psp.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_off0000c4ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4EC 6100 bytes
SHA-256: d8b80211fe05110356d0d5d2f48715b69697ef8bbe3f63a22527212807320bf1
font_01_sfnt_off0000d9bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BD 10116 bytes
SHA-256: 78e5005b0b42e3bfef53a102d7ecf3bcca7d2524555b581b063d75f90beab3d3

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