Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8fa3e568a281615…

MALICIOUS

PDF

105.8 KB Created: 2021-03-19 16:44:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 3febcdb752f0546399ad1d6d2f696718 SHA-1: b0fc1b90ed618222f7cb63e53ddad577a98ca1f5 SHA-256: e8fa3e568a281615a3500ae241247a8fcef9ce76d3cbcb9e1e92a9565e7a3d11
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary suspicious URL identified as 'dugedepap.ru'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is part of a link farm on disposable hosting, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://dugedepap.ru/award?keyword=probability+distribution+function+properties+pdf PDF link annotation
    • https://mivagefe.weebly.com/uploads/1/3/1/4/131453450/rumulijusuxufi-nokilo.pdfIn PDF document text
    • https://kisofoga.weebly.com/uploads/1/3/1/3/131383553/namafukim.pdfIn PDF document text
    • https://cdn.sqhk.co/votojuxosaf/gMjgNha/bubble_play_poker_strategy.pdfIn PDF document text
    • https://cdn.sqhk.co/muzolorakow/QhjPief/big_bang_theory_cast_member_dies.pdfIn PDF document text
    • http://fenijazefak.22web.org/frommer_s_easy_guide_to_boston.pdfIn PDF document text
    • https://cdn.sqhk.co/fatepotax/GXii6gi/kijixukolobazefupi.pdfIn PDF document text
    • https://retariluwefise.weebly.com/uploads/1/3/4/8/134858211/6112e91ee2f.pdfIn PDF document text
    • https://firunonosud.weebly.com/uploads/1/3/6/0/136052948/jebewusugoxoduvi.pdfIn PDF document text
    • http://fastcreditreport.info/77591331727f03tq.pdfIn PDF document text
    • https://bixaguvukimub.weebly.com/uploads/1/3/1/8/131872105/worexewa.pdfIn PDF document text
    • http://ehaberdevlet.com/when_is_the_never_fade_movie_coming_outqbkpi.pdfIn PDF document text
    • https://cdn.sqhk.co/rajunakeb/MN0jigc/63607813506.pdfIn PDF document text
    • https://cdn.sqhk.co/lubometusoz/TjhghyA/87918460454.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/87b9c717-df78-4c06-b1e4-25c5ec385f7e/does_walmart_have_tire_service.pdfIn PDF document text
    • http://nakepusejedub.epizy.com/tefewusebevomesew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f111ba7d-10a8-4796-96c9-216da7fd9519/toyota_sienna_2006_radiator_autozone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c06c445b-073c-4bcf-aa0e-82eef9b3b35b/kezezosimi.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/apj_abdul_kalam_vision_2020.pdfIn PDF document text
    • http://desorebo.epizy.com/7741088599.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/susuzeder.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/finnegans_wake_walpole_facebook.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/what_are_the_12_steps_aa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a0c496a-aad1-40ad-8338-94aa0ef7de53/english_grammar_learn_practice_test_free_download.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
    • 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_off00014198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14198 5392 bytes
SHA-256: 129b154a6da66d15dac364d33db4801d3fd3dd60dd823db23e9236cdfb4fb1ef
font_01_sfnt_off00015402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15402 13648 bytes
SHA-256: 82d89f7894b0e566e443b6c99b89b3b57646b4d37fe0f0a0fb6d94f5ab1e8afd
font_02_sfnt_off000182c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x182C9 16348 bytes
SHA-256: 15800f483f50f009fda792b32241cd11241c33e9cf217d4e32a01f6df730a8bd