Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f0c6dac21791e7a…

MALICIOUS

PDF

74.6 KB Created: 2021-03-27 21:42:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 18a86d9f5f11e876fafcd85cb235d83a SHA-1: de2370368fa34c654454c9d4acaaca481a916fce SHA-256: 2f0c6dac21791e7a454252951e8afb4a2a3343d2f2bde366681157d893930840
186 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 0.9996

Heuristics 6

  • 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.
  • 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://maypoin.ru/award?keyword=risk+in+international+trade+pdf PDF link annotation
    • https://cdn.sqhk.co/rujamuzizogo/Vjahbhj/mewolupobit.pdfIn PDF document text
    • https://cdn.sqhk.co/nujorazaje/hjjgjhS/retroarch_configure_xbox_360_controller.pdfIn PDF document text
    • http://copyright-central-media.com/pdf_reader_pro_android_apkxf8m2.pdfIn PDF document text
    • https://cdn.sqhk.co/gulijolane/ejbjeii/creepy_babysitting_game.pdfIn PDF document text
    • http://itdiscount.info/pl_sql_if_statement_in_selectzjhbo.pdfIn PDF document text
    • http://hayatevesigar.online/zinuwenolotax3u3h.pdfIn PDF document text
    • https://cdn.sqhk.co/fenozidu/9GOdQvI/wagenotokubekavik.pdfIn PDF document text
    • http://leafester.online/unduh_samurai_flash_mod_apkkigb7.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/SjgXAaJ/lixaruragi.pdfIn PDF document text
    • http://lotto-investclub.com/pogenutikodutexasozoxirojac.pdfIn PDF document text
    • http://arthromedshop.xyz/73591360214qkjx6.pdfIn PDF document text
    • http://ersoil.fun/bergeys_chevrolet_zieglerville_pag59e7.pdfIn PDF document text
    • http://shop50off.info/hp_laserjet_m1212nf_mfp_change_cartridge9w75z.pdfIn PDF document text
    • http://pifofumega.22web.org/e-_newsletter_design_templates.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f02d085-981c-429c-8c44-1d11e60e8d8d/gixitise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/683535ba-e730-4d60-90cc-441e9bb87cc2/john_deere_7000_planter_plates_for_sale.pdfIn PDF document text
    • https://78151a86-a557-4e49-81aa-a2539eea45c7.filesusr.com/ugd/204f4f_081b3eac3a264cf9a69c8d24ecbb0119.pdf?index=trueIn PDF document text
    • http://sisuwilir.epizy.com/sqlmap_kali_linux_tutorial.pdfIn PDF document text
    • https://7afd96e6-4611-46d4-9b98-d111b897c281.filesusr.com/ugd/154221_149b7cb443d64441b523525413967baa.pdf?index=trueIn PDF document text
    • https://0b609444-e5a2-4a7e-9779-a3c6bae51a53.filesusr.com/ugd/529dbf_dd82fd2e453543f6af7bcbf9c817d5f0.pdf?index=trueIn PDF document text
    • http://kilubediboxut.rf.gd/tojadija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f585679-d654-4dc7-b6ad-bc150b0925c3/duriduvosiwezevusudosut.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_off0000e7ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EA 5108 bytes
SHA-256: 9b740a504d04bc94469253c982d4b4f8ad75cf3125bddff3b38945a2083a00ae
font_01_sfnt_off0000f95f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95F 10508 bytes
SHA-256: b766067f0c2b4f5d96c3916068af299038f77179301d4a26e5e2a945eaf2bedc

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