Malicious PDF — malware analysis report

Static analysis result for SHA-256 65df031147590565…

MALICIOUS

PDF

78.7 KB Created: 2021-03-31 05:53:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: edf7cb9655719e0dbea255ed4cf676a6 SHA-1: 6f0592f038dd70798bbcbe2b901e0a85be880cef SHA-256: 65df031147590565711b5ea9fbf500f45c1df669a4fb081778cae29af729c7e3
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://seumenha.ru/wix?keyword=matrix+multiplication+word+problems+worksheet PDF link annotation
    • https://cdn.sqhk.co/dodirijobadi/Sdjhgiw/nizividumogonemigoram.pdfIn PDF document text
    • https://cdn.sqhk.co/nugunexinazo/ejfxgjs/nhl_playoffs_schedule_2019.pdfIn PDF document text
    • http://foxeged.22web.org/album_song_ringtone_free.pdfIn PDF document text
    • https://cdn.sqhk.co/lazuxorus/EnEUBhj/xefufedodenaxux.pdfIn PDF document text
    • https://cdn.sqhk.co/delotijuw/jgheiaY/66571707714.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/davubewu/kazezotuxuxo.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/a_song_of_ice_and_fire_illustrated_edition_book_3.pdfIn PDF document text
    • http://najunanewoji.rf.gd/28438472021.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/ponapalilirawugamuzexe.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/livaluzele.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/9213291567.pdfIn PDF document text
    • https://s3.amazonaws.com/fivebo/what_is_the_job_of_oxygen_in_cellular_respiration.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf204419-8804-4312-aa1d-3f9024206481/el_conde_de_montecristo_pelicula_2002_latino.pdfIn PDF document text
    • https://064d663d-f6b2-44cf-a6ad-083da5f315e5.filesusr.com/ugd/77eba6_ccda44e1826d4881842ebe6b74611712.pdf?index=trueIn PDF document text
    • https://44eeb0f0-4dc9-4d8b-b3fd-cc7ace98e90e.filesusr.com/ugd/a083a1_68f80196423e444f82fc221b2b7f079b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7014ba03-cf46-404a-9996-3974f01a9b36/how_to_insert_a_power_symbol_in_word.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/7271215649.pdfIn PDF document text
    • https://2703069b-a6ff-4ff9-983c-db139a8d76ba.filesusr.com/ugd/8b61cf_3b83e55e98474cf5ae9e8b0134952565.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pogolo/dizezajonamup.pdfIn PDF document text
    • http://fafinonez.rf.gd/common_core_algebra_2_homework_answer_key.pdfIn PDF document text
    • http://bagemok.epizy.com/sigagenowadulurewujesat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34148ab4-233f-4625-b14d-6ea2d6345504/tofanejasapizowivof.pdfIn PDF document text
    • http://vodukatova.epizy.com/agastya_samhita_book.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/13105830604.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f59b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59B 5680 bytes
SHA-256: a6cb2fdae78b4f4ab2d2ec38191a13edaa4be62c8d85aee50e3a939a3ac658a6
font_01_sfnt_off000108d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D7 10372 bytes
SHA-256: e2495e31feb794a2762650210f0ecfa40c268a01659ed751f7ace83436cbe694

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