Malicious PDF — malware analysis report

Static analysis result for SHA-256 c55728580029584b…

MALICIOUS

PDF

85.2 KB Created: 2021-06-05 08:19:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d6d21490aac8e1f2f69eb2fd8fa6dd3 SHA-1: cff581d45a3d83d3d1ecd2c5fded45ad246281fd SHA-256: c55728580029584bf48ee990b3cd23ead0c94d0ce06a827e29a95243073f1aaa
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious phishing content. It contains a large number of external links, suggesting a link farm designed to distribute malicious content. The primary URL, 'https://oniceh.ru/pbw?utm_term=youtube+cara+download+gta+san+andreas+di+laptop', appears to be a lure for downloading a game, which is a common social engineering tactic. No scripts were extracted, but the PDF structure and numerous external links indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://oniceh.ru/pbw?utm_term=youtube+cara+download+gta+san+andreas+di+laptop
    • https://cdn-cms.f-static.net/uploads/4408333/normal_6059bd15a57d0.pdf
    • https://marezupudi.weebly.com/uploads/1/3/0/8/130874377/godek.pdf
    • https://cdn-cms.f-static.net/uploads/4414342/normal_5fd271bbc72cc.pdf
    • https://zodajuxos.weebly.com/uploads/1/3/4/2/134235393/9683138.pdf
    • https://static.s123-cdn-static.com/uploads/4447641/normal_5fe515340b8ce.pdf
    • https://vanevuzitikuge.weebly.com/uploads/1/3/4/5/134588875/goboxekuwib.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5d1fb2b1-9e68-43bb-bed4-81765fa0ce89/hansel_vs_gretel_2015_movie_ratings.pdf
    • https://uploads.strikinglycdn.com/files/1409275b-54f3-487b-8fc5-6cd5547e9b63/73158213317.pdf
    • https://uploads.strikinglycdn.com/files/d6f283a4-4788-49ba-9678-db2d5b03033d/zugekomijudup.pdf
    • https://uploads.strikinglycdn.com/files/f3550331-baae-407a-bfa1-d9bf6c159007/granny_mod_minecraft_1.12_2.pdf
    • https://uploads.strikinglycdn.com/files/7a799c4f-b392-4160-ad06-d51c6c5e46e3/retos_matematicos_para_nios_de_cuarto_grado.pdf
    • https://uploads.strikinglycdn.com/files/9c624285-c72b-4235-a6e1-5df42a36cdaa/urgent_care_doctor_salary_california.pdf
    • https://uploads.strikinglycdn.com/files/caa55818-2d54-46c7-9d9a-54c67f420ec8/pabakosolup.pdf
    • https://uploads.strikinglycdn.com/files/f153f7ac-83cf-4976-a6d9-fbb1360f5ff0/how_to_add_zoom_filters.pdf
    • https://uploads.strikinglycdn.com/files/66d3f727-b3ab-4a34-a830-5f3da6263b4c/sudidi.pdf
    • https://uploads.strikinglycdn.com/files/05694e53-25da-4ef0-9fa6-ee056e4d5f9f/ecology_of_the_planted_aquarium_free.pdf
    • http://gapufipi.pbworks.com/f/comparative_and_superlative_adjectives_activities_online.pdf
    • https://uploads.strikinglycdn.com/files/2208e531-1b35-4f1d-8c16-67c06b35a121/what_is_a_meet_and_confer_declaration.pdf
    • https://uploads.strikinglycdn.com/files/e0f96dc4-261d-4707-9d32-c2fe1a21a42b/brownie_safety_award_pin_activities.pdf
    • https://uploads.strikinglycdn.com/files/eb326211-d2a6-400d-8daa-f0e25f52f9fd/samsung_un32j4000ef_manual.pdf
    • http://visetululiv.pbworks.com/f/43942838024.pdf
    • https://uploads.strikinglycdn.com/files/9c6e4ad0-65c9-495b-bac8-d870163399d9/56085407025.pdf
    • https://uploads.strikinglycdn.com/files/c2ae188f-fe68-4ade-a34a-210c59d57d6c/how_to_remove_pimple_spots_overnight.pdf
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec6d.bin
0618e5a2d4e122f66362095a9ba14869123d3abb56398954c9f007c2f2c31d3a
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6D 5436 bytes
font_01_sfnt_off0000ff02.bin
6d2a3a16cc464ce72cf05976c7f96a31c93af2202e0dc760c37a694345e222ee
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF02 1800 bytes
font_02_sfnt_off00010792.bin
388a9caf0ff0a261962119f9fcfaa8603965bb876260978bec57b4f78576844e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10792 12396 bytes
font_03_sfnt_off00013019.bin
4954ddec54c61b6acc7eddbac306bc890d05f3afdfcf3ae890c7612da0a7d668
pdf-font-stream PDF embedded font (sfnt) at offset 0x13019 16376 bytes