Malicious PDF — malware analysis report

Static analysis result for SHA-256 6270010c48acf2c6…

MALICIOUS

PDF

81.9 KB Created: 2021-03-22 01:16:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 8e309cab6f7775617b35787b318092a5 SHA-1: ffb003953b79cd0d84a29e47d8ae4075e3ba7241 SHA-256: 6270010c48acf2c6eee9da416ee31f39c6667bad843599245455395ae8a96521
126 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm and has been flagged by ML classifiers and ClamAV as malicious. The embedded URL, 'https://leonvi.ru/award?keyword=apprendre+solf%25C3%25A8ge+piano+pdf', suggests a phishing or scam attempt disguised as an educational resource. While no scripts were explicitly extracted, the PDF structure and URL suggest an attempt to redirect users to a malicious site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://leonvi.ru/award?keyword=apprendre+solf%25C3%25A8ge+piano+pdf PDF link annotation
    • https://kipowiginudi.weebly.com/uploads/1/3/1/3/131383469/af0c47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402014/normal_60257497c677c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393026/normal_604eb69c9083b.pdfIn PDF document text
    • http://momivegod.22web.org/weight_lifting_app_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457861/normal_601bc5d4cf1ff.pdfIn PDF document text
    • https://vororesefuvemux.weebly.com/uploads/1/3/0/8/130813496/7bf11f7ea9e648.pdfIn PDF document text
    • https://koreperuk.weebly.com/uploads/1/3/2/6/132680900/nazelez.pdfIn PDF document text
    • https://resewirebibabap.weebly.com/uploads/1/3/1/3/131379054/tuvatabarijufex.pdfIn PDF document text
    • https://badikixokatapi.weebly.com/uploads/1/3/0/7/130739740/fodusujituvejet_jopepajemazipe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381756/normal_604947a5634ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459025/normal_6005074ed9768.pdfIn PDF document text
    • http://jurofenopoxu.iblogger.org/gemakifipogun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tedowafomaru/buzati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afbce821-5666-400b-a86f-83e41d0618d2/womum.pdfIn PDF document text
    • https://b064d0e4-88d6-4b7e-8087-8ebf790fcba6.filesusr.com/ugd/ca32a8_22c42915737e4e228829b2ea7a401bfa.pdf?index=trueIn PDF document text
    • http://sevijude.epizy.com/lotodowedazesawuj.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/how_to_improve_5_year_old_social_skills.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0adfbc57-2638-4483-bd5c-4a1c8dc61d92/14185486452.pdfIn PDF document text
    • https://b3df6b87-ca8d-4c26-b815-8c697753997b.filesusr.com/ugd/896a32_5edb7c14d0524a7ab33f4b5ff7737e14.pdf?index=trueIn PDF document text
    • http://kofuzedu.epizy.com/29130678998.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b251e02c-2709-4c18-827b-34bd45cb554c/does_costco_sell_dyson_air_purifier.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/manual_autocad_2020_espaol.pdfIn PDF document text
    • http://zixadadafupeg.epizy.com/exam_ref_az_103_microsoft_azure_administrator.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/82618501391.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B3 5048 bytes
SHA-256: c567c0b52ae6eda0bb54261ad8f0e3adf85dad764f8e9bcc9c63b43e7de5b9bb
font_01_sfnt_off00010298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10298 12684 bytes
SHA-256: f53985af8b7b5be12bdcb4bd2bc0dcdf814c9db182a7128d672479e03dbd51e3
font_02_sfnt_off00012a44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A44 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361