Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e8d7d2c368a6a59…

MALICIOUS

PDF

80.2 KB Created: 2021-04-17 19:40:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: cf1ba72c8bdbe3b198b808ca51c83587 SHA-1: c084c9494dcf9840c966655a948728c1390e7d5c SHA-256: 8e8d7d2c368a6a59b3eca3316ca1992b15391044c745bff601cea5f45e16029a
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with a significant heuristic indicating it's a link farm on disposable hosting. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to yoga, directing users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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/strik?utm_term=yoga+asanas+names+in+hindi+with+images PDF link annotation
    • http://zimezobot.getenjoyment.net/list_of_adjectives_with_translation_in_spanish.pdfIn PDF document text
    • http://xexapitanegis.getenjoyment.net/al_quran_free_download.pdfIn PDF document text
    • http://rezolurumo.iblogger.org/android_emulator_pc_linux.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/gre_verbal_reasoning_practice_test_with_answers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ranitirunom.myartsonline.com/rotemavujegodesasimejisok.pdfIn PDF document text
    • https://78905da9-dd21-4190-abaa-c894c042e703.filesusr.com/ugd/851c7c_6eb3cd9a8e234934a3a711c0201610c6.pdf?index=trueIn PDF document text
    • https://dda5c79a-a75d-44d9-a006-48dec3bfe172.filesusr.com/ugd/115d6e_73a14b97bed64ed2b732cc1ed9a6ebfe.pdf?index=trueIn PDF document text
    • http://zabuzuko.epizy.com/labuwemopamibadixivawo.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/1672640710.pdfIn PDF document text
    • https://b70645e9-42d7-44c6-80f2-f165c8819e8d.filesusr.com/ugd/3f1130_195a7fcc58c3456eb6a04acb8ce7a7c7.pdf?index=trueIn PDF document text
    • http://riledabetime.myartsonline.com/best_study_bible_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/poxojarubefosakijug.pdfIn PDF document text
    • http://fidusigugowubo.epizy.com/2001_polaris_trailblazer_250_carburetor_rebuild_kit.pdfIn PDF document text
    • https://bef89f6e-6323-4b84-ad9d-a44490bfcc4f.filesusr.com/ugd/96768c_cd796ab95b884404a48b96f875d2a572.pdf?index=trueIn PDF document text
    • http://nitaxakebumeru.epizy.com/befavimul.pdfIn PDF document text
    • https://fa202315-5cd5-4006-9a99-7c5d4406650e.filesusr.com/ugd/61804c_24575bd7be7542a5a6aa8e16077589b7.pdf?index=trueIn PDF document text
    • https://2efabd41-1f95-43d0-8245-5f8eb9267247.filesusr.com/ugd/2f4ddf_09fc3f1613b34b37b32ea61fe44e45ad.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/penale/79721821032.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/auto_rickshaw_game_mod_apk.pdfIn PDF document text
    • https://9e2901ea-5d25-41a5-867c-54d0774c6e48.filesusr.com/ugd/4d0f37_30e1968142574d9f8eb69d17016336c1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/rijedidij.pdfIn PDF document text
    • https://a539eca0-ed6d-4e39-a9fd-63162facd464.filesusr.com/ugd/8170ee_08c572a6219240b59197ee00039ce4e8.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEF 5164 bytes
SHA-256: 74957f4ed61a85e5abaec458e4d40c53e47903a0c1eb748817aada21a7972748
font_01_sfnt_off00010e70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E70 10912 bytes
SHA-256: bce03102d825fa99bf53e5066b7bb0c9baad1bef93da0367d11b737e07c1aa13

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