Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8cf5c3e3f094102…

MALICIOUS

PDF

63.8 KB Created: 2020-12-20 08:45:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7f1fb4171cee4cb80ccdf1e87849c807 SHA-1: af4bec61c94ee006576818e262b3d21275cbbc5a SHA-256: d8cf5c3e3f0941025bb5bc66a73fd763b0617ab80f64d2eb52b7a0fbf42a3304
94 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 an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gettraff.ru/strik?utm_term=kenwood+tm-v71+service+manual In PDF document text
    • https://tibiwurab.weebly.com/uploads/1/3/2/6/132695994/dizum.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/zerejibixupav/employee_contract_template_ontario.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcf3a3a9697205d6f684640/t/5fd6c79789566e781f5e7685/1607911321412/9966920717.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4e27f81c9a2a0c987697/1606372903841/gw2_huntsman_guide_1-400.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe1160cb3e0f5771165090/1606291808245/progress_index_petersburg_va_obits.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/pass_compos_avoir_ou_tre_exercices.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3440bfbf-0ac7-47a1-a09d-865278ccf82d/hack_gu_vol_2_keyword_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/robis.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc553571c8c7413144f5d77/t/5fc9d47352b5874c85923a91/1607062644746/wilton_master_cake_decorating_piping_tips_set.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/nicomachean_ethics_book_10.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc81a80526ad1a5999a26b/t/5fdca3568b7a255883273476/1608295280914/addictive_keys_free_version.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10f47bd14ff0dd29d9327/t/5fc75a5a7995075abde2b5d5/1606900322802/27741240950.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2b4a587-328d-41f7-9361-2826ab6ef0df/user_manual_lenovo_yoga_2_pro.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc681ecaffbf90a661134fa/t/5fce3f9ac00f007cea14e145/1607352218925/15457602098.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/incantation_and_ritual_flute_sheet_music.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_off0000bc04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC04 5372 bytes
SHA-256: 4b09494eedbcd97afefd5b7592292fa2dd2eadda3fc9bd2ad00f7daa327c6795
font_01_sfnt_off0000ce5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE5E 10756 bytes
SHA-256: b0777d5384d28add6cd957813ca082996b021b8095bc9b1781c0b9a32d6fbdfd

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