Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd16f749df41c699…

MALICIOUS

PDF

73.2 KB Created: 2021-03-02 19:29:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 03fcfeed295f42b379905a9d8f48e785 SHA-1: 9e991b4787040c2daf98154e886697d91e28d287 SHA-256: cd16f749df41c699c389ce6ed23b8f9272960508299d5a613f0304baa0b919ab
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 0.9997

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://jottigo.ru/wix?keyword=territory+war+gameplay PDF link annotation
    • https://cdn.sqhk.co/judixixelof/elQ4hby/wedebusik.pdfIn PDF document text
    • https://serekarivevug.weebly.com/uploads/1/3/1/4/131407867/6522496.pdfIn PDF document text
    • https://minawitagolufu.weebly.com/uploads/1/3/5/3/135312922/6293636.pdfIn PDF document text
    • https://cdn.sqhk.co/livaxipovage/ghjKid5/smart_assistant_oppo_f17_pro.pdfIn PDF document text
    • https://cdn.sqhk.co/tefivezik/gibrjcu/tinejovesedeba.pdfIn PDF document text
    • https://cdn.sqhk.co/goduwonon/ciaiSgj/ativafit_yoga_balance_trainer_ball.pdfIn PDF document text
    • https://gozaxuvo.weebly.com/uploads/1/3/4/6/134612917/3663664.pdfIn PDF document text
    • https://cdn.sqhk.co/dosakupu/ROIjjOX/55379566653.pdfIn PDF document text
    • https://cdn.sqhk.co/xumirikebixo/iabgejg/zombie_blaster_nerf.pdfIn PDF document text
    • https://mofafodoler.weebly.com/uploads/1/3/0/8/130874416/880136.pdfIn PDF document text
    • https://cdn.sqhk.co/fupupusamun/a7jeido/marshalls_department_store_near_me_now.pdfIn PDF document text
    • https://cdn.sqhk.co/fogibadeku/djgtJfj/juwumez.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/ximupuv/hp_elitebook_8540w_battery_not_charging.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/fekofozeju.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/dovosiwupewos.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/61046857939.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/event_management_budget_format.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/pevelopakivigamewumurebax.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/aplikasi_beetalk_versi_lama_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/mefuzexuterunew.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/fesebaparisusabap.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_off0000e35c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35C 5104 bytes
SHA-256: 3f742fa61cf3a432b28b845bf9d1fc08383e9352d11cf5020f7dafa2fd27e674
font_01_sfnt_off0000f4be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BE 10212 bytes
SHA-256: fa5f834ba5421481985d44260d2cd080181efa5d70feaa87598faaea4b451d00

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