Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2a3d7e6d9eba4ff…

MALICIOUS

PDF

77.6 KB Created: 2021-05-11 16:40:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8e89ca3533971d9d49d3747e1839959c SHA-1: 1566c0980ec94b7298a50ff37ab7f94c6b7d42f2 SHA-256: d2a3d7e6d9eba4ffe018f6250061f063c944819a88daeacef858b914fecf91e8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9992

Heuristics 5

  • 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 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://resalured.ru/strik?utm_term=go+tell+it+on+the+mountain+lyrics+and+chords+youtube PDF link annotation
    • http://it50discount.pro/bollinger_bands_formula_excelqfl81.pdfIn PDF document text
    • http://vixixar.22web.org/bufoferivito.pdfIn PDF document text
    • http://hr-insider.com/22926587662woqmq.pdfIn PDF document text
    • http://gabonilud.22web.org/fimemelozumenir.pdfIn PDF document text
    • http://mybatut.store/vevelozovabexif9s10k.pdfIn PDF document text
    • http://idclick.cash/47777225626fj8dm.pdfIn PDF document text
    • http://dibesugumika.iblogger.org/68679897559.pdfIn PDF document text
    • http://mscredit.info/the_tolkien_ensemble_-_song_of_beren_and_luthien_lyrics35119.pdfIn PDF document text
    • http://winsl.space/pocket_rally_game_download_pcx8zr2.pdfIn PDF document text
    • http://siankaanmexico.com/jidiveruzixebezamuromav6otvq.pdfIn PDF document text
    • http://vvinorama.fun/rossmann_prospekt_bltterkatalog08zlz.pdfIn PDF document text
    • http://kifowiwesujuwil.iblogger.org/kifevedifuguwe.pdfIn PDF document text
    • http://ostanni.fun/reformas_borbonicas_resumen_facilug0gg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7722bba5-72ad-4d15-a72d-9ce9fbdcf1b5.filesusr.com/ugd/772ad5_4d5ceba255a7418991244ed7583a5181.pdf?index=trueIn PDF document text
    • https://ab25a8b3-4d80-4d4b-93a1-c1347014fa7c.filesusr.com/ugd/8d0191_c8915cbf0e0e4481b0bc53052ab0b456.pdf?index=trueIn PDF document text
    • http://muvalinifotu.rf.gd/53307818645.pdfIn PDF document text
    • http://fajanelumaj.epizy.com/a_level_maths_mechanics_notes.pdfIn PDF document text
    • https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_fe896fccd72240a2a5f2c35d7dea639e.pdf?index=trueIn PDF document text
    • http://nepafel.epizy.com/java_mcq_questions_with_answers.pdfIn PDF document text
    • http://jajabidabewaw.rf.gd/banner_saga_2_android_apk.pdfIn PDF document text
    • http://sezusin.rf.gd/rajivinejeg.pdfIn PDF document text
    • https://901c4554-6fda-40bf-8344-1f1538f5dc06.filesusr.com/ugd/a76634_7e2cbac390724ae6b11c053bd33fed95.pdf?index=trueIn PDF document text
    • http://wixujovevimaba.epizy.com/revolution_drinks_menu.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_off0000eeed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEED 5452 bytes
SHA-256: 5d890239943eb61c762ed12797607535a98118bfb99b65dd96568d947eb521fd
font_01_sfnt_off0001014b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1014B 11720 bytes
SHA-256: 034d257d47d4567587afc96460285b609e8e3f1a1fe7de05c9cb5ae7d2554d0b

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