Malicious PDF — malware analysis report

Static analysis result for SHA-256 b17dc92ed2c9afd9…

MALICIOUS

PDF

110.2 KB Created: 2021-03-23 16:54:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d6f776c1dbdd95baca506e1b4848f205 SHA-1: 266f0b9442871edc340c38752d459ecda3376c4a SHA-256: b17dc92ed2c9afd9dfd15b802f768b549c4d59ad2da1ec8b6b8ddda899c6da28
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, and 'ML_NYX_PDF_MALICIOUS' along with 'CLAMAV_DETECTION' strongly suggest malicious intent. The embedded URLs likely lead to malicious sites, potentially for credential harvesting or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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/strik?utm_term=the+tragedy+of+macbeth+act+1+reading+check+answer+key PDF link annotation
    • https://cdn.sqhk.co/vekuniruf/gjLfZms/2872216119.pdfIn PDF document text
    • http://polobasopika.mywebcommunity.org/kibukugaku.pdfIn PDF document text
    • http://ruxenawuxovogu.getenjoyment.net/singer_heavy_duty_4411_sewing_machine_reviews.pdfIn PDF document text
    • http://vudasuti.mygamesonline.org/angularjsmake_example.pdfIn PDF document text
    • https://bavibexovapow.weebly.com/uploads/1/3/4/6/134643610/xufilagun.pdfIn PDF document text
    • https://kosodakugup.weebly.com/uploads/1/3/4/6/134655388/suzibaretu.pdfIn PDF document text
    • http://giwitap.getenjoyment.net/25168294927.pdfIn PDF document text
    • https://cdn.sqhk.co/wijelukifap/gxxfdae/wimumojaleb.pdfIn PDF document text
    • https://cdn.sqhk.co/pofoxubo/hQmgejb/zobipasanojemovi.pdfIn PDF document text
    • https://cdn.sqhk.co/bijininabex/dghFibN/army_navy_game_field.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ddb1515c-011f-4d6c-9a6c-b305a2039a85.filesusr.com/ugd/477ac5_054b33472dda434eb2123fc2c5db22e3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lanubili/28340384517.pdfIn PDF document text
    • https://8909b315-4d59-4940-aabf-0fdaa532e0ad.filesusr.com/ugd/4542d9_0d5ddf90edd543e8b3927f2855b1939b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/ncfm_algorithmic_trading_module_study_material.pdfIn PDF document text
    • https://2f60c0de-bae8-48d8-8f3f-ce7907f87c52.filesusr.com/ugd/badafb_27079b5b79cd43a8a4e6422365ecd333.pdf?index=trueIn PDF document text
    • https://5f90d536-2a72-4461-adff-280afd3056cb.filesusr.com/ugd/27c394_203c7c5d336547b697c100a661e4ddb3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/firudegix/16447415950.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/oasis_be_here_now_remastered.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/gopro_hero_4_black_manual_update.pdfIn PDF document text
    • http://bibezakomi.myartsonline.com/impulse_buying_behaviour.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/kukonel.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezux/pilgrims_progress_movie_2019_cast.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000157d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157D7 2952 bytes
SHA-256: e211f2d6e0d1bf1fd17bd5150bc2724fb7c0f1d37b1c69b855d9dcad8de34ab0
font_01_sfnt_off00016265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16265 5804 bytes
SHA-256: 66deb58affa4b5802921172f0c7582fbf2a94c737999e268773a8a3f28951690
font_02_sfnt_off0001760d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1760D 1944 bytes
SHA-256: df95e079a26d38a5e36065ac3a1faf906c10b473173d1e46ed244158e6db8dab
font_03_sfnt_off00017f58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F58 12652 bytes
SHA-256: 3a5295ce4d72016d9094a740642143abd1af32b1fbbb1a12568afc64e327f90d

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