Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dc3bc72d8203de9…

MALICIOUS

PDF

81.2 KB Created: 2021-03-12 19:57:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15a3a58411c8dd4e2db1222dae9d7e80 SHA-1: 2846e0dacc0974f25c53d0d934c0d2ccb3ccb92a SHA-256: 0dc3bc72d8203de97dac100112e7c3bf9872534c529d474a4879d4fa2e1c029b
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. One prominent URL, 'https://lozipotod.ru/aws?utm_term=un+curso+de+milagros+lecci%25C3%25B3n+104', is directly associated with the malicious detection. The ML classifier and ClamAV also flagged this PDF as malicious, indicating a phishing or trojan payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://lozipotod.ru/aws?utm_term=un+curso+de+milagros+lecci%25C3%25B3n+104
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jokotaziweluge/rikuxiputebebiv.pdf
    • https://uploads.strikinglycdn.com/files/b272600c-a0dd-4d42-92fd-11f75267739f/what_is_the_224_valkyrie_used_for.pdf
    • https://s3.amazonaws.com/vavejijitatofu/meme_generator_pro_apk_cracked.pdf
    • https://e8c82854-2a0b-4c0f-82de-bac600ce06e6.filesusr.com/ugd/d017d5_3f537b8418604ca7b238d183657c30bc.pdf?index=true
    • https://s3.amazonaws.com/retobifulipo/83470925510.pdf
    • https://3e1af3dc-cf37-4f58-935d-0a6065bc5ce9.filesusr.com/ugd/3ca236_757ed4ef652b41c8b02f28427eb743e1.pdf?index=true
    • https://s3.amazonaws.com/nijosinizo/facebook_videos_iphone_app.pdf
    • https://91506351-5699-48ce-85e7-8e7d071f4e87.filesusr.com/ugd/d775a9_0ef0ed6d73cc4fcfa01466d262992904.pdf?index=true
    • https://s3.amazonaws.com/dejolavubukugeb/pagenunakovitotiruf.pdf
    • https://s3.amazonaws.com/tobovunoberiki/is_the_maze_runner_scorch_trials_on_hulu.pdf
    • https://edb7bb8d-792a-4213-93ec-7f573d37cc74.filesusr.com/ugd/bfd504_30d826a0b4c24a36b5bd34027d482199.pdf?index=true
    • https://s3.amazonaws.com/rowubunak/45507935838.pdf
    • https://s3.amazonaws.com/gomaxod/92884902133.pdf
    • https://s3.amazonaws.com/bisapovepizaj/48011512717.pdf
    • https://uploads.strikinglycdn.com/files/195e7708-f7b4-4a5b-a99a-10cc6dd94f17/what_gluten_free_cant_eat.pdf
    • https://s3.amazonaws.com/levovod/apa_format_cite_article_online.pdf
    • https://c5c27394-2042-4749-9b39-d1c24dcbd9f0.filesusr.com/ugd/e9b987_7acb0e5042674d82a465f644a66543cc.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ea62aa14-5b2b-4026-8496-31165d7d8a2e/all_souls_trilogy_book_2_summary.pdf
    • https://s3.amazonaws.com/poresi/mathworksheets4kids_quotient_rule_answers.pdf
    • https://s3.amazonaws.com/farowug/39747332312.pdf
    • https://uploads.strikinglycdn.com/files/a7f120d2-ed57-452c-91ca-abe00a525f97/1874670038.pdf
    • https://uploads.strikinglycdn.com/files/403203ce-f588-48cb-b2b4-eec648d8c2ab/91595863530.pdf
    • https://uploads.strikinglycdn.com/files/e3b5d98a-b10a-4df3-a945-2dca2b0bf6e3/21208336484.pdf
    • https://s3.amazonaws.com/xugigabitulu/semowafepagib.pdf
    • https://s3.amazonaws.com/tobovunoberiki/nugulafujebetodanesi.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_off0000fbff.bin
406f1cc6216ae91c74bcfc62934c0a317aa41a92c9196928b2a1802d0626df2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFF 5668 bytes
font_01_sfnt_off00010ef9.bin
6984e94d89ced928de73e198b679d98b7c2b0a8af1ce61c576b02f4c1a629280		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF9 11648 bytes

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