Malicious PDF — malware analysis report

Static analysis result for SHA-256 20617ebd42c74abe…

MALICIOUS

PDF

85.5 KB Created: 2021-03-30 07:48:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 180367d295aa5cbfce2b2c6c8f61c4b1 SHA-1: b5c237ed6c45a036dee04018acd3611489070583 SHA-256: 20617ebd42c74abe23d59a680ac5b70c63776e6611c041ec2428b848f794a2a8
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, with one prominent link pointing to 'xajibur.ru', suggesting a link farm or SEO manipulation to distribute malware or phish users. The document body, though heavily obfuscated, appears to be related to search terms, reinforcing the SEO-based lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://xajibur.ru/wix?keyword=rain+bird+sprinkler+timer+manual PDF link annotation
    • http://wordsidepost.top/epson_printer_driver_for_chromebookhfh3c.pdfIn PDF document text
    • http://alisaborodaenko.design/tinijelevagisohtwbh.pdfIn PDF document text
    • https://cdn.sqhk.co/duxivutunum/arc2jaj/dungeon_keeper_2_1._7_cheat_engine.pdfIn PDF document text
    • https://cdn.sqhk.co/duvetezoje/hdpFghE/resident_evil_8_village_chris_redfield.pdfIn PDF document text
    • https://cdn.sqhk.co/natokaze/iegdhhA/hard_boiled_egg_diet_results.pdfIn PDF document text
    • http://qupieasy.online/path_of_glory_cyberpunk_rewardsrjkep.pdfIn PDF document text
    • https://cdn.sqhk.co/rosisole/gjtuW6Z/4k_video_editor_windows_10_free.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://5e6d3f51-9b35-4a29-baf4-1f036254a461.filesusr.com/ugd/99a8f2_dd94fb2cf18e4f35ab56066068fbd6f6.pdf?index=trueIn PDF document text
    • https://d05b2b94-0af3-401c-a6ef-75d00d0b58ae.filesusr.com/ugd/3bca44_a79b9f3a689c490aad1a8b3fd4fa7178.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/87547906731.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5011a55-0c10-44a7-9ae1-db18b24fc955/2421882526.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3caed722-bb4c-46d7-bfaf-54d799c2d4a0/gibuwawupotifukem.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/how_to_take_under_arm_temperature.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/g_shock_ga_150mf_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/126b4e00-a4c1-470a-ab9c-e8b059efbdcd/pioneer_gm-a5602_manual_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/109d1dd3-3c3c-44b1-841b-785a8a478ff0/excel_vba_find_type_mismatch.pdfIn PDF document text
    • https://36425c1f-c329-48aa-845d-1f8252cb45c8.filesusr.com/ugd/01d500_5c0e4001f66b4b8d87a62ed4f4661bce.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/sims_4_laboratory.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/their_eyes_were_watching_god_movie_amazon_prime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd91ea0f-b88e-496e-9c14-d6468332e140/metal_gear_solid_v_ground_zeroes_review_ps4.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/11961439408.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/bumevekipago.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/fujanoziwijepirugawabeten.pdfIn PDF document text
    • https://5634f520-c25d-421d-ab67-3d94505d13cb.filesusr.com/ugd/1b85ab_b3fbc1d7d799407caaf687f00d010824.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rirusozo/30711164827.pdfIn PDF document text
    • https://2ac56fc1-f7ee-4366-9cb2-1681469c68ee.filesusr.com/ugd/b914b5_92903dadcb7140799562299fdf4e55e9.pdf?index=trueIn 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_off00010300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10300 5088 bytes
SHA-256: a56904b626ae0f9cedd01ce362329a08f52485ff1a7403647c96ea6a480b21e4
font_01_sfnt_off00011427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11427 11148 bytes
SHA-256: 68e0790c4d3c27ed2c2a7ef226f4070b7dda6f48cc1a67fd312b23d0402a1a3e
font_02_sfnt_off00013a07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A07 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176