Malicious PDF — malware analysis report

Static analysis result for SHA-256 c03348b789f959cd…

MALICIOUS

PDF

71.3 KB Created: 2021-03-11 04:50:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5e981f62b432759efd4afc6e6b04c8f3 SHA-1: 9f7726f39fb352316e826c12217d1a94951179b5 SHA-256: c03348b789f959cd9b7840e413a1c6c206bdf8738f520ed876232576cb380621
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://dafemum.ru/strik?utm_term=real+estate+licence+online+texas PDF link annotation
    • http://zuvatewovu.scienceontheweb.net/ansi_150_rf_flange_dimensions.pdfIn PDF document text
    • https://cdn.sqhk.co/susorajin/fhef32S/jibjab_free_alternative_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/noxibogalu/hhjfjdw/beat_music_player_audio_player_mp3_player_apk.pdfIn PDF document text
    • http://rumurel.mywebcommunity.org/where_are_there_food_banks_near_me.pdfIn PDF document text
    • http://jijuduli.mywebcommunity.org/what_is_a_good_portrait_lens_for_nikon.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/baritexovopa/fitbit_charge_hr_not_syncing_android.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/public_health_reports_2017.pdfIn PDF document text
    • https://128fc002-9ed4-4a8f-9a6b-83b43563a9ed.filesusr.com/ugd/6812d7_ad85d774e5d8401b9a4073aa86aded4b.pdf?index=trueIn PDF document text
    • https://98cdd5c5-c43e-49eb-9373-39517e896cbb.filesusr.com/ugd/90661f_75975e2e97ce42938ada149b944abd2e.pdf?index=trueIn PDF document text
    • https://a1359116-1358-4cde-afc5-3600b4bb50db.filesusr.com/ugd/3b0c81_8809e57e28274b43b12d6d6d49e68758.pdf?index=trueIn PDF document text
    • https://12dd324c-696b-4d67-8c19-991f3eacec2c.filesusr.com/ugd/eeb7bd_68403174e9bb4dd1bce271ad040e7959.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/abp_maza_news_theme_music.pdfIn PDF document text
    • https://ca39a19f-16f9-469f-ab0b-65ec0463b8d0.filesusr.com/ugd/cc9b97_6cdd2e010dad4317b03c54110890ac3e.pdf?index=trueIn PDF document text
    • https://6843e3eb-5573-46e1-90a0-370cfc2b4a0d.filesusr.com/ugd/89b1bc_6e6ec2535e21418b8de0f72455559099.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/ignou_date_sheet_mca_2019.pdfIn PDF document text
    • https://0296ecfc-28ae-4fa5-925c-67a25994cace.filesusr.com/ugd/c88839_13dd4f61c0374c80a5a23f58820d372a.pdf?index=trueIn PDF document text
    • https://2eda13a9-9e0f-47dd-bbfa-a9a5028a3314.filesusr.com/ugd/61c57f_3de894b2d6874f00a9adfbbe7bb63054.pdf?index=trueIn PDF document text
    • https://580b68e3-2104-4118-ae5b-4f285de1c062.filesusr.com/ugd/dad7b5_379c760ad4a74dfda2be187dc5377e5c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ae744ae-c899-4962-b0b6-8f48ee8a8449/hobart_meat_slicer_motor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/058de769-fc24-43d4-a433-fe2e71b46daa/6030147543.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eab099ad-b1ed-4819-b89b-f4211ba45f18/surface_area_and_volume_of_pyramids_worksheet_answers.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_off0000cef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF7 4560 bytes
SHA-256: 28d1405a6141ab3afa58b662ee47a81727bc38364aaf11ac3d3c2567718fdd40
font_01_sfnt_off0000de7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7D 10276 bytes
SHA-256: fc5eb9bc2de284a3254e867f050b58920ff5e01ef23d0c45708d94dfef5127b8
font_02_sfnt_off00010196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10196 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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