Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6dbd1eca91b7bf9…

MALICIOUS

PDF

82.2 KB Created: 2021-04-03 03:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 762015cb489eb7b6b01df69619526a02 SHA-1: 49ab7d7e7a23b7a92485edb498dcce2c0f4d7b97 SHA-256: e6dbd1eca91b7bf9b2b71dd899599153d20c8d8fafdc58c96736ee926cf8ebe5
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The document body, though heavily obfuscated, appears to be a lure related to a book search, likely to trick users into clicking the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://seumenha.ru/award?keyword=al+arabiyyah+bayna+yadayk+book+1+part+2+pdf PDF link annotation
    • https://ravixibede.weebly.com/uploads/1/3/4/5/134584659/2982204.pdfIn PDF document text
    • https://wefizaxire.weebly.com/uploads/1/3/0/9/130969527/8009892.pdfIn PDF document text
    • http://bas-vorota.ru/alamo_drafthouse_yonkers_menu2k34i.pdfIn PDF document text
    • http://neo-tp.ru/rajojunezetikenefqjoo1.pdfIn PDF document text
    • http://manybigs.space/xavifaganekadaw2p4s.pdfIn PDF document text
    • http://helpverifybadges.com/computer_book_marathi0lv6m.pdfIn PDF document text
    • https://vazagivire.weebly.com/uploads/1/3/4/8/134874695/161250e4ec9cb2.pdfIn PDF document text
    • http://nenugatigubom.66ghz.com/definicion_de_enfermeria_segun_varios_autores.pdfIn PDF document text
    • https://folejate.weebly.com/uploads/1/3/4/9/134902611/fugefepagadonusa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kevikawimal.epizy.com/amar_bangla_tv_apk.pdfIn PDF document text
    • https://bf23b77b-49a9-4bef-a898-a03cfb94aefa.filesusr.com/ugd/134172_e8f5c61eb02a4414ba0e8a2b3f7acd32.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/85b160f3-d18d-4c51-ac6b-e74e85ba0432/kemper_profiling_amplifier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a77019fb-311d-4f5d-80f3-a3aeece6f308/76335157948.pdfIn PDF document text
    • http://nupuzawov.onlinewebshop.net/90750954588.pdfIn PDF document text
    • https://d7ae471b-a447-437d-81b4-4e603f8679d9.filesusr.com/ugd/0a3240_06667fc4c6234dca9dab24448d99539e.pdf?index=trueIn PDF document text
    • http://sudexixurijaxoz.atwebpages.com/totitiwefinosajo.pdfIn PDF document text
    • http://xozumuzexo.epizy.com/xuxodipokumiwareleti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6630735-2137-4929-a825-78b698b11c2a/samsung_rsg257aars_ice_maker_removal.pdfIn PDF document text
    • https://198d5876-2e36-4a54-a59d-b4c1060b65be.filesusr.com/ugd/4733ca_39a6d1836d5e495c9c6221f4f2a1d074.pdf?index=trueIn PDF document text
    • http://fidalanono.myartsonline.com/appositives_worksheet.pdfIn PDF document text
    • https://c5c27394-2042-4749-9b39-d1c24dcbd9f0.filesusr.com/ugd/e9b987_c4bdad7e02b74144bddc3fa766a3345e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f0e60a6-b436-41ec-8dfb-511c2c9346cc/how_to_check_echo_test.pdfIn PDF document text
    • https://081e7fb2-604d-424b-9b75-a58d54a71a44.filesusr.com/ugd/abd6ea_f8065892109842f38ac344d8ef252bc9.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DF 5432 bytes
SHA-256: c9c90dbc2de31187a477bc194542a38f4ad0da15ffa27c9531b85c6fb1e33a56
font_01_sfnt_off0000fb5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5D 10736 bytes
SHA-256: 4fc270b135097c48441ed1dd8081fb7313d728315d88003626118c9187d1c78d
font_02_sfnt_off00012075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12075 17664 bytes
SHA-256: 149d8c33ec4eb880ae55e24eeffac33be699b30af3fce03ce17428e6e66aed52

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