Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc217f16ed520e8a…

MALICIOUS

PDF

75.3 KB Created: 2021-06-14 10:20:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 717b0883ce9e9e82288980ab250dc8c9 SHA-1: 05e4bcdb8eb15c7e2e81bbef3db17a8ab2265dd2 SHA-256: fc217f16ed520e8a1706113f6e9bb0578bb917b917c69556216f7af704049278
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are disguised as search results for popular content like song lyrics. The heuristic PDF_SEO_LINK_FARM indicates a deliberate attempt to create a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to direct users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nomylo.ru/pbw?utm_term=sun+raha+hai+na+tu+female+lyrics+mp3+song+download
    • https://biwaxosele.weebly.com/uploads/1/3/1/4/131437294/7860060.pdf
    • https://dinufipaxa.weebly.com/uploads/1/3/4/4/134440308/5867090.pdf
    • https://xijiweba.weebly.com/uploads/1/3/5/3/135387982/1861117.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b187bb97-c0f7-408e-8574-cf3489ba79a3/skyrim_can_you_use_racemenu_on_npc.pdf
    • https://uploads.strikinglycdn.com/files/4bc658f6-b2ef-43c4-be8e-b06f4ce3d297/what_does_project_x_party_mean.pdf
    • https://uploads.strikinglycdn.com/files/bca0650b-9474-4228-96ac-e0af5b00df43/chemistry_balancing_chemical_equations_worksheet_answer_key_phet.pdf
    • http://fuzujufod.pbworks.com/w/file/fetch/144662988/what_were_the_12_labors_hercules_had_to_do.pdf
    • http://fezuwiriniz.pbworks.com/f/five_nights_at_freddys_free_mac.pdf
    • http://redelaw.pbworks.com/w/file/fetch/144586911/how_to_add_rhythm_to_a_poem.pdf
    • https://uploads.strikinglycdn.com/files/d603be31-5a2e-4c43-a622-b86d3e9ab622/how_to_find_instantaneous_speed_on_a_distance_time_graph.pdf
    • http://vomuseteweto.pbworks.com/f/here_comes_the_sun_flute_sheet_music_free.pdf
    • https://uploads.strikinglycdn.com/files/8531e573-92f9-48b1-b629-a0d3189eb3d8/14394837394.pdf
    • https://uploads.strikinglycdn.com/files/e7f741c8-8c0e-432d-9ec0-1b3a3e19b54b/68366735453.pdf
    • http://tisowowuduwe.pbworks.com/f/pokemon_xyz_all_episodes_in_hindi_dubbed_download.pdf
    • http://ruwomodanom.pbworks.com/w/file/fetch/144612000/secondary_chinese_textbook_online.pdf
    • http://fuvulokaxeka.pbworks.com/w/file/fetch/145102749/english_grammar_and_composition_class_8.pdf
    • https://uploads.strikinglycdn.com/files/f9ea9cef-3968-43f6-9b67-e6dd1beb535e/manuel_carrera_diaz_manual_de_gramatica_italiana.pdf
    • http://lojefizowoj.pbworks.com/f/ppsspp_gold_full_version_for_pc.pdf
    • http://vosavazurax.pbworks.com/f/got7_look_mp3.pdf
    • https://uploads.strikinglycdn.com/files/42f5c3c4-2b38-4863-940d-d16c6381f092/92099066536.pdf
    • http://lesokulovisu.pbworks.com/f/how_to_disassemble_a_nordictrack_treadmill_1750.pdf
    • https://uploads.strikinglycdn.com/files/1d243079-183c-4d57-806c-972496dae599/quotes_from_le_petit_prince_en_francais.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e546.bin
d9e8f9b080c078ecd53e99a0043936ab33cec58154436c47fb28fbd9643aa72c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE546 6032 bytes
font_01_sfnt_off0000f9bb.bin
c2674a837df38a6899285b3b31712213e2618d9dfcc250d908344dbc86079e0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BB 11096 bytes

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