Malicious PDF — malware analysis report

Static analysis result for SHA-256 d83c3fafd055bb73…

MALICIOUS

PDF

85.6 KB Created: 2021-03-30 12:46:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4cb8efefc0549913701f2e902f553a08 SHA-1: 758d6578f219df7f0ef76c66d76343acd3f4a0b3 SHA-256: d83c3fafd055bb73a2aefcf22ea276c0f6030202309103126b7642556f60555b
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to potentially malicious domains, and is flagged by ClamAV as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'Financial accounting 11th edition'. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' indicate an attempt to redirect users to external sites, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/aws?utm_term=financial+accounting+11th+edition
    • https://cdn.sqhk.co/mebozesilo/Pjbltvs/othello_board_game_app.pdf
    • https://cdn.sqhk.co/nomitusibop/eiajjRi/ortel_mobile_tarif_andern.pdf
    • https://cdn.sqhk.co/farategibod/h7Sqy3N/all_the_types_of_landforms.pdf
    • http://pojegan.22web.org/65479290429.pdf
    • https://cdn.sqhk.co/limiwebu/fQGgfha/bosojasefosumugaxokudifaz.pdf
    • https://cdn.sqhk.co/pugepavofu/fahjoii/buzevakewofitosobazazupi.pdf
    • https://cdn.sqhk.co/bapulofuw/fcWNjCZ/52383541845.pdf
    • https://cdn.sqhk.co/munuluxel/qB0wNhf/delta_blues_music_definition.pdf
    • https://cdn.sqhk.co/gebunemif/qRig6he/racing_gearbox_no_synchro.pdf
    • https://cdn.sqhk.co/niserutom/ejjgjL8/dojelugiguzuwekefika.pdf
    • https://cdn.sqhk.co/bogulevim/icwzzni/large_yellow_apple_calories.pdf
    • https://cdn.sqhk.co/baxajufim/dXLgche/granny_chapter_two_escape_boat.pdf
    • https://cdn.sqhk.co/gixedomawa/njj0igj/73328456268.pdf
    • https://cdn.sqhk.co/sozonexof/if6vydb/cara_membaca_multimeter_analog.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/nefagolom/57755590672.pdf
    • http://kokabine.rf.gd/toro_string_trimmer_attachments.pdf
    • https://b998fa74-583e-446a-a2a7-67f41460fdb2.filesusr.com/ugd/e081f8_65f4a17b0c064406b8a01f99e4b10925.pdf?index=true
    • https://34e51215-b586-4e01-b3ea-a219475a7b91.filesusr.com/ugd/46481b_07b610ee556141c9a458bf3c9e4bad05.pdf?index=true
    • http://jejuton.rf.gd/aquella_orilla_nuestra.pdf
    • https://828c6a01-da61-4814-986a-f72e64f4f334.filesusr.com/ugd/cdfdba_2f716ee241844743849a8f5fa352ec17.pdf?index=true
    • https://s3.amazonaws.com/fuwuzerijofa/android_studio_3._0_kotlin_tutorial.pdf
    • https://c63359c4-faa5-40af-ad11-254ddd3d100c.filesusr.com/ugd/838c33_e547f465d5e6476f8817c8c9e3be45a7.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010150.bin
ca1ce7c5513e1dd96cf6e9daeb08ce41184bfbbb0fa016994402504ddfd264c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10150 4816 bytes
font_01_sfnt_off000111a5.bin
60b5001c6c32018d11af43b386f8a6186d1647461bb108bf6bccf7b0b4322d8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111A5 11756 bytes
font_02_sfnt_off0001393e.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1393E 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.