Malicious PDF — malware analysis report

Static analysis result for SHA-256 56122a804639dfb7…

MALICIOUS

PDF

104.7 KB Created: 2021-05-31 04:50:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 15a934e6e7d5b2dfbcc07e32d5574f0e SHA-1: 2aea5526df0578792837ebea9b6c11881df25eb2 SHA-256: 56122a804639dfb7e3ba97a08763304d99af72541354c909b503a019ff45eee8
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 0.9985

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://nipisod.ru/strik?utm_term=canciones+para+rosario+de+difuntos+pdf PDF link annotation
    • https://meverofukibax.weebly.com/uploads/1/3/4/6/134620555/9648466.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455390/normal_602875185bd8c.pdfIn PDF document text
    • https://gofabede.weebly.com/uploads/1/3/1/4/131453232/xolavegexilotid.pdfIn PDF document text
    • https://rafafokisot.weebly.com/uploads/1/3/4/7/134738004/54a1d5.pdfIn PDF document text
    • https://sajolunuweto.weebly.com/uploads/1/3/1/4/131407571/5095635.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455375/normal_6012c8b013ee4.pdfIn PDF document text
    • https://gokejaxax.weebly.com/uploads/1/3/6/0/136056436/momefa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b631607a-0525-4869-af8f-48c80b276148/mathematics_textbook_for_class_8_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d71cab1-3df4-4b19-a6f4-1f577759ae4f/jesus_be_the_center_chords_david_funk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/590dfa12-d5e6-4dd5-9392-b954c3f8dccd/ea_sports_ufc_3_pc_requirements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c95f4f2-91ca-4f11-bf8d-87ff8a1815ee/tokugow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2454f5cc-7e0c-49fa-ba70-df0c92ef485b/45005249243.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2626a732-ba1b-419c-8774-69656021b2f2/how_to_run_javascript_on_chromebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed3e2dd6-ef27-41b4-9360-24af8da2e9fc/97513886942.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8778d397-323f-47ec-8b53-9747fa427e52/johny_johny_yes_papa_video_free_download_3gp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65fdc9d3-edc9-4873-9b89-75d1bec1ebb9/what_is_narrative_writing_style.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2020f540-68df-455a-a0e8-8d1cce797eda/67592735780.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eeba65c-91e3-4b89-87a4-29c6d3825871/comcast_remote_control_battery_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/638a8e3e-31c2-4845-8eb5-04a49bcfd713/are_all_hp_pavilion_chargers_the_same.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c975a62-e275-4d13-9e2f-d7db4d120133/how_do_i_fix_the_red_light_on_my_tp_link_router.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cb717d0-a427-4ae4-a4d7-f27e25804cca/what_is_the_best_bible_commentary_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df8d089e-e63d-4780-8c57-b0c1b15e05c4/la_times_homicide_report_east_los_angeles.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12536 6440 bytes
SHA-256: 629123bfde0685c5f69bbdd27ec008bde0224d5c30af1dabb990f6ee33ea778e
font_01_sfnt_off0001352a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1352A 5024 bytes
SHA-256: 874e51f3b3812f6d0d1762f2b41f64118c0ba89fa3dbf1629a24ba49435682c1
font_02_sfnt_off00014642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14642 2024 bytes
SHA-256: 5d59e80714f055d0e20d1c4ed594903f00ea25dd365ddc0e243c90ca16be52db
font_03_sfnt_off00014fda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FDA 13400 bytes
SHA-256: 84fa5fba401751f6277479af9810e7c3d22c8fb73e76fc83f50356302c6b6335
font_04_sfnt_off00017ad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17AD2 16720 bytes
SHA-256: 3dcccb73a492c4a77b4781c9fd45162c43be967a607d8d994e64adacb77bbc78