Malicious PDF — malware analysis report

Static analysis result for SHA-256 2452335a8c2cf2c5…

MALICIOUS

PDF

77.4 KB Created: 2021-04-15 00:46:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 2524dffca8a3c5491bc7690248b879ae SHA-1: e09b0dbc45aa26944d587b15b20ca95d8d8b08ad SHA-256: 2452335a8c2cf2c5adb12d66023a635c93e4ff58c379cb00a7e60d8e1cb41f7c
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with one specifically pointing to a URL that appears to be a phishing or malware distribution landing page. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further suggests a malicious purpose related to link manipulation and potentially driving traffic to untrusted sites.

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://mezovuduw.ru/strik?utm_term=brother+vx+1120+how+to+wind+bobbin PDF link annotation
    • http://frankiearvelo.com/invoice_receipt_template7oe9k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448137/normal_5feb6cb86c363.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452400/normal_604f0c7491faa.pdfIn PDF document text
    • http://melapotu.22web.org/v_for_vendetta_quotes_v_introduces_himself.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490519/normal_6001523cbc36c.pdfIn PDF document text
    • http://russianpatentexpert.com/25315229300h7ryi.pdfIn PDF document text
    • http://mazezoda.22web.org/8341698166.pdfIn PDF document text
    • http://italywow.space/26549302198b7uem.pdfIn PDF document text
    • http://lighttravel-ng.com/tuesdays_with_morrie_ch_1_summary20bre.pdfIn PDF document text
    • http://tesubozapo.22web.org/ata_thyroid_cancer_guidelines_2020.pdfIn PDF document text
    • http://safetymirrors.xyz/email_contact_form_html_phpyoot2.pdfIn PDF document text
    • http://trikolor.site/4095872608m316t.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vonizevugopu.rf.gd/singular_plural_exercises_with_answers.pdfIn PDF document text
    • http://terenido.epizy.com/google_sheets_advanced_tutorial.pdfIn PDF document text
    • https://2703069b-a6ff-4ff9-983c-db139a8d76ba.filesusr.com/ugd/8b61cf_da3b1d0679c341ca8ff3dcec808c5d0f.pdf?index=trueIn PDF document text
    • http://ribebipewafiwas.epizy.com/bahubali_1_full_movie_telugu.pdfIn PDF document text
    • http://dowulutidapewu.epizy.com/hayward_goldline_salt_system_calibration.pdfIn PDF document text
    • https://67536400-2f23-40e2-9d3a-36ae3f4dfb8c.filesusr.com/ugd/5312ea_ad02f77f1cfa455d91907c981acf530a.pdf?index=trueIn PDF document text
    • http://xewojof.rf.gd/pokemon_game_ultra_moon.pdfIn PDF document text
    • https://13adc596-845f-4f4a-b539-e2c04a0a4b5a.filesusr.com/ugd/6e2da7_13cf0c596a1841ad8dbd5acfd2abeca0.pdf?index=trueIn PDF document text
    • http://nimetegukixiz.rf.gd/canalith_repositioning.pdfIn PDF document text
    • http://lotawopobakitab.epizy.com/zujajozirazegomizofoti.pdfIn PDF document text
    • https://c2dbac7f-2075-4dc1-ad03-af0d0352bff2.filesusr.com/ugd/278743_426a53a50f9441afb094c591e9a55c75.pdf?index=trueIn PDF document text
    • https://5ce19dfa-329f-495d-88d1-e1e7834d9072.filesusr.com/ugd/d902bb_a9c2f5614a3e447db5d85ed1df593ee1.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_off0000f455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF455 5228 bytes
SHA-256: f6e6f7095ed4e0b65b43c457803660ddfa83097c5968aac98d2c5f609ee0e7b0
font_01_sfnt_off00010638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10638 9908 bytes
SHA-256: aa65da29ee7a00084d08d31a5c16aea4698d2abfe45158f654c1347ab64572ed

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