Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c59687d064a7307…

MALICIOUS

PDF

78.2 KB Created: 2021-03-25 17:20:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6c4e0a9f7ce62b24631fe28e9c1f8a3c SHA-1: 913b2a32b0d6b68aad796793e2e8baac68961eef SHA-256: 4c59687d064a730792d9293443c947d77179a591cd6457b4cec76bce8c201a2b
156 Risk Score

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 0.9992

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://zajinet.ru/award?keyword=advantages+and+disadvantages+of+partnership+pdf PDF link annotation
    • https://budogifu.weebly.com/uploads/1/3/0/8/130874026/eb531.pdfIn PDF document text
    • http://sanamikegimelab.22web.org/rubarobubepo.pdfIn PDF document text
    • https://jasunibimagimuf.weebly.com/uploads/1/3/4/7/134733129/2a1756c.pdfIn PDF document text
    • https://mokoluwi.weebly.com/uploads/1/3/4/5/134595511/3b8b5c971c2.pdfIn PDF document text
    • https://bukenazupe.weebly.com/uploads/1/3/4/5/134584610/sewinalikewi_bitizofem_fafelobo_nemupufigiv.pdfIn PDF document text
    • http://xovebud.mygamesonline.org/19916857259.pdfIn PDF document text
    • https://lonomunemol.weebly.com/uploads/1/3/6/0/136082408/pedogab.pdfIn PDF document text
    • http://jinevul.mygamesonline.org/how_to_troubleshoot_remote_start.pdfIn PDF document text
    • https://digokevun.weebly.com/uploads/1/3/4/7/134747151/ropijoferami-munazimuminuxi-refiluru.pdfIn PDF document text
    • http://wotomonexu.22web.org/how_to_answer_tell_me_about_yourself_interview.pdfIn PDF document text
    • https://wimiwimevodozaz.weebly.com/uploads/1/3/0/8/130874111/wuratapiwevuvajajuj.pdfIn PDF document text
    • https://zuduwejigorim.weebly.com/uploads/1/3/5/3/135329148/vuxewim-gazowo.pdfIn PDF document text
    • http://vitetoka.scienceontheweb.net/business_english_vocabulary_in_use_advanced.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/wegemebufojafak/30688486860.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/best_face_sheet_mask_for_acne.pdfIn PDF document text
    • http://kadizilurojiniz.onlinewebshop.net/att_u_verse_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/buggy_car_game_free_for_android.pdfIn PDF document text
    • http://xatoveg.epizy.com/chicken_run_mp4_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/96211053962.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/laos_travel_guide_canada.pdfIn PDF document text
    • http://siwodonodefofo.epizy.com/how_to_get_wic_checks_by_mail.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/13328259342.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/abu_dhabi_sports_tv_guide_english.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/marathi_actress_photos.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CD 5320 bytes
SHA-256: e7a97a6a8a931ce6fd0bab7848183255800d946e5bae0df25fe2dfd42b6e2935
font_01_sfnt_off000106ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106EF 10676 bytes
SHA-256: f4f78334eacf542d2bdff8b13415bd5f51ac9a5b43140db9ffd46a87581676ed

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