Malicious PDF — malware analysis report

Static analysis result for SHA-256 aea764bb6af4f461…

MALICIOUS

PDF

80.1 KB Created: 2021-02-28 07:08:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5fe555d3e394b5e20b1302ed49c288ea SHA-1: ccd1ca4efe5ca462b4d871970ae7c9616bfa7cf7 SHA-256: aea764bb6af4f461674bde17b2c76d7af3065486592e473f0e9b6ebf6c6c3d9a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

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://lozipotod.ru/award?keyword=berlioz+symphonie+fantastique+5+movements PDF link annotation
    • https://binemipo.weebly.com/uploads/1/3/0/8/130874238/76d6516e9bf89a0.pdfIn PDF document text
    • https://cdn.sqhk.co/lewikokezina/aBFbigr/doluzuvoxipuwexameju.pdfIn PDF document text
    • https://vigoxanumevu.weebly.com/uploads/1/3/4/4/134466257/ff06f.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/how_to_program_my_xfinity_remote_to_my_onn_tv.pdfIn PDF document text
    • https://kekufakaxuw.weebly.com/uploads/1/3/2/7/132740700/kaxobetizux.pdfIn PDF document text
    • https://nefarixuk.weebly.com/uploads/1/3/1/4/131407944/fopabeg_rojorup_gedemudukajuvu_misamenerupu.pdfIn PDF document text
    • https://wuzikixow.weebly.com/uploads/1/3/0/7/130775075/d00f8d7015.pdfIn PDF document text
    • https://zafasasuk.weebly.com/uploads/1/3/4/7/134713251/xoneraxiwapo-zezaxopimu-dijinolexoleti-dojunij.pdfIn PDF document text
    • https://zekisotirateme.weebly.com/uploads/1/3/4/3/134368555/4505087.pdfIn PDF document text
    • https://kuwujevo.weebly.com/uploads/1/3/4/8/134864034/wasoguza_wikape_najeje.pdfIn PDF document text
    • https://cdn.sqhk.co/xofozomuwef/rBrJzig/73437776205.pdfIn PDF document text
    • https://cdn.sqhk.co/dugixikisim/igeicSf/best_superhero_role_models.pdfIn PDF document text
    • https://cdn.sqhk.co/pesasotiro/fgjibgg/wixalesovetor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/52231624657.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/free_child_travel_consent_form_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/47931848334.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/dufokozigitejumi.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/free_action_cartoon_photoshop.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF6 5536 bytes
SHA-256: edc2ea8a4bf17b5d7e8ed4b00353f7fa560674631a3bbfbd9491943dade8cdc7
font_01_sfnt_off000101b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B8 10228 bytes
SHA-256: 4b9a66947d13aa103fbabe9dff0811e280ab8590370a160910ae3e408d4d21ee
font_02_sfnt_off000124c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124C4 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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