Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a2724998c9e9dff…

MALICIOUS

PDF

68.9 KB Created: 2021-03-24 00:17:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 93a0c13ff76040dd133f419c86b867c7 SHA-1: 5243251a59834f90ac4dd5bc05be9586309c5030 SHA-256: 8a2724998c9e9dffbb7d2d8a8fd743c4e91d75a6039def037ff500be4f0dd3d4
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 0.9996

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://kuzutuzo.ru/wix?keyword=worksheet+combined+gas+law+answer+key PDF link annotation
    • http://lazadoso.iblogger.org/83858401531.pdfIn PDF document text
    • http://kakaxazirobolob.iblogger.org/b_l_a_d_ka_full_form.pdfIn PDF document text
    • http://fakaremun.iblogger.org/rugiseleref.pdfIn PDF document text
    • https://bojozavo.weebly.com/uploads/1/3/0/7/130740433/5870518.pdfIn PDF document text
    • https://simokodopegaliw.weebly.com/uploads/1/3/0/7/130776428/9146613.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/tazopaju/businessman_movie_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/fifobomatuvigibe.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/how_to_set_temperature_on_true_freezer.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/28654549520.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11a54a3d-b107-40cb-b0c3-1ba86439a4d9/why_wont_netflix_work_on_my_panasonic_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6fa9f0b-d985-4fd6-ba62-adc98fbc7f01/gawepuvojabigibir.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/how_to_change_tp_link_wr841n_admin_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e4fd721-db3e-419d-8bb3-b6b85e073de5/rinnai_propane_tankless_water_heater_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/95272638862.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd9fc3b7-1886-4496-b51f-99cded256a71/zepexuvabumovab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc3e7720-5612-4888-96fa-90e54ee3dd4f/bic_america_f12_sub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2afc3cd-58e0-49ae-9696-3b707a8b73c3/ximedepidire.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/wobuzodifatilabaruwenup.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/litijurotizijine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dd0cbc9-ca86-4626-9f95-d0391f5fe159/dreamcontroller_wireless_custom_xbox_one_controller.pdfIn PDF document text
    • http://wometopususap.rf.gd/ptcb_exam_study_guide.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_off0000cf17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF17 5764 bytes
SHA-256: 2ebf09ab376eb0cea257e6d2de26e0cd27ebb12ba112f5a39ca1d46a27e725ef
font_01_sfnt_off0000e2aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AA 10316 bytes
SHA-256: d16c1fd23a9cd1bd046d2d93f5711a5f4c82c278bdb280c9d160a44d8d5c0958

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