Malicious PDF — malware analysis report

Static analysis result for SHA-256 815a78695658fb99…

MALICIOUS

PDF

75.1 KB Created: 2021-03-23 15:01:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 9cad61edc30a817a7c2a45fe2eba850e SHA-1: 470d2e9fc1a8a0a4829be102c4d94e1752c5b085 SHA-256: 815a78695658fb99f9a73dba616406a6c5392904cc945f0960b6fdedbe7d3e46
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous external URLs, including one pointing to botokaw.ru, suggesting a phishing or content-scraping lure. The document body, though heavily obfuscated, appears to contain keywords related to lyrics and application metadata, which may be part of a deceptive tactic to mask its malicious intent. No scripts were extracted, but the presence of multiple external links indicates an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://botokaw.ru/wix?keyword=i+just+want+to+praise+you+lyrics+benny+hinn PDF link annotation
    • http://lodorobirat.22web.org/96708642109.pdfIn PDF document text
    • http://sumomubidisuwo.iblogger.org/family_violence_and_child_information_sharing_scheme.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0315d410-4255-45a3-9477-873949dd02ac.filesusr.com/ugd/f85006_f0e5517cc1d14a4195b558154151b256.pdf?index=trueIn PDF document text
    • http://tedijafubivot.epizy.com/91139077425.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e37e2f2-3923-453f-a76d-174251b574ac/tipos_de_investigacion_educativa_segun_autores.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cf1eac6-a983-411f-ab3b-e15f2a10cf38/importance_of_online_education_essay_in_hindi.pdfIn PDF document text
    • https://a35aa970-3e4e-4c20-be1f-53d10001bce9.filesusr.com/ugd/af4e73_98da7914c0744969954a6340251c0047.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7509dc96-b708-4591-ab27-552a58633000/gopepelilomoziguz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf54598c-fe44-4997-8bdc-da667dad2f2e/how_to_make_a_poem_step_by_step.pdfIn PDF document text
    • http://xupasafagimi.rf.gd/87627831049.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2864d261-f87d-4078-83a2-3028062df0d0/siferubagegibixijula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7461bed-adb0-43c9-a385-3f00991921fa/kalogimojirulovamazeniza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4ce4e35-f6ee-46ab-8135-1bd89b88663d/provide_examples_of_effective_methods_of_communication_in_the_workplace.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97d8b6a5-e4bc-4212-a2eb-dbc2ade16296/52015117140.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9eff0b9-52ca-4e7e-9077-1b96c23b175c/momowifatozosisirukar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10b6a842-88ba-41db-9d75-4790ba16c946/14090514870.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2aa58ea-c7e4-4868-af63-abf5a8bd683b/cant_get_canon_printer_to_connect_to_wifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2a2e425-47c8-41ff-b179-b23fb90959f8/how_to_write_jodi_arias_in_prison.pdfIn PDF document text
    • https://a43ab9c2-5efb-4cee-ac06-b782a0f5e207.filesusr.com/ugd/4826f5_d05146b207014188a8d1b918936252f9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e275523e-1cf2-49a4-98e4-2b7df6b6b044/fogujix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/140f3191-efb7-4300-aa6a-e3187ca73c18/52586683895.pdfIn PDF document text
    • https://cef8af8d-7071-4339-ac50-fc417d371010.filesusr.com/ugd/a89196_97db1e3e91e54b56992c14b884b8ccb4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/474bef0b-1b07-4654-8bfc-cdb3cc153de1/67624090512.pdfIn PDF document text
    • http://relumewamamit.rf.gd/word_problems_addition_worksheets_2nd_grade.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_off0000e7cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CF 5368 bytes
SHA-256: 3d001d7119b663e604d186188c3a74d748a8120145d14d143cf0536613981a43
font_01_sfnt_off0000fa20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA20 10720 bytes
SHA-256: 48b1c1e93dd6eecb2bdb2a470f9df7a232bc89cfc16517cc1c9c91add5f5fe53

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