Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c55c7e99b712f1c…

MALICIOUS

PDF

71.7 KB Created: 2021-03-08 12:10:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 99892deae319980f6776a527d24b7159 SHA-1: 7b7d68beea26dc3a48e3986283d63332e85d5251 SHA-256: 2c55c7e99b712f1c7833e5ee1e9f4aa4488bd2761d71c2e75987158daa6b3c5b
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://mezovuduw.ru/award?keyword=tratamiento+de+ascaris+lumbricoides+en+ni%25C3%25B1os+pdf PDF link annotation
    • https://cdn.sqhk.co/jumupebuvi/exlgdjd/21313454565.pdfIn PDF document text
    • https://cdn.sqhk.co/duzixulok/ahgNOB3/lofudifexezuseluxejajovo.pdfIn PDF document text
    • http://dufifudusimube.mygamesonline.org/sail_race_rules.pdfIn PDF document text
    • https://cdn.sqhk.co/salavogi/cihjihc/nightmare_before_christmas_nail_art_stickers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c2bc7a71-cb21-434c-84f6-8d2fc09ed56d.filesusr.com/ugd/03ae60_e13fecd1488541c0944663fa3c430174.pdf?index=trueIn PDF document text
    • http://kakafemapekumu.epizy.com/queen_size_bed_sheet_dimensions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b813a89-4dfa-4be3-91bd-5439ed5dbd65/the_80_20_principle_richard_koch_amazon.pdfIn PDF document text
    • http://kakapefetabol.rf.gd/auto_click_2._2_rar.pdfIn PDF document text
    • http://diruxepuf.epizy.com/attack_on_titan_characters_heights_season_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ba6b38b-b7eb-451b-ac83-6db02326ecdb/how_to_use_unity_in_art.pdfIn PDF document text
    • https://da5bec28-7969-4117-8ffb-5069fce5e80c.filesusr.com/ugd/31593d_39586283464e435bbdbfb67f43ce2375.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/acdcefb0-570b-4f40-b087-2f9e994989af/how_do_i_set_the_alarm_on_my_timex_nature_sounds_clock_radio.pdfIn PDF document text
    • https://01dc7cc6-b8ed-446e-8cc8-1ad78882ed38.filesusr.com/ugd/e23fbb_3ac81e85f3ed4604ab7ea2e596fb4f9f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/da3bd067-20d2-49e3-98ec-420b67afefb7/luruwexawotaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5576500e-295b-4eb7-a7a9-87b523705b04/work_power_and_energy_multiple_choice_questions_with_answers_doc.pdfIn PDF document text
    • https://6f4861c6-cdf0-4a5f-ba2d-f9c5e5bfbee6.filesusr.com/ugd/77941b_b84a749df5884295bb142e3f229a8d7a.pdf?index=trueIn PDF document text
    • http://lamupilabixekuw.epizy.com/beats_earphones_user_manual.pdfIn PDF document text
    • http://pojoviraxerojo.myartsonline.com/97465922085.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EB 5600 bytes
SHA-256: b7139b6eebbbc97148f2d21dfa9b6084e51b74b736b4675d28984785f89c0267
font_01_sfnt_off0000eb91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB91 10840 bytes
SHA-256: 2e35f5eb2812f252fd423ede7fb72c0e16669de4e518f74efe33152298b2fea6