Malicious PDF — malware analysis report

Static analysis result for SHA-256 f369e5ff210a3df9…

MALICIOUS

PDF

91.2 KB Created: 2021-03-30 04:10:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 1a1eb4758009aae3bc2a3256029a8207 SHA-1: 7fd1d9e0189a0e5e512defa2a54d94fd384b8b0e SHA-256: f369e5ff210a3df9b1b96962f762496dbe62843e99bb1ca9f63f2ef166a39475
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. It embeds a URL that mimics a search engine result for a popular book, likely to trick users into clicking it. The embedded URL `https://vilenefex.ru/wix?keyword=percy+jackson+lightning+thief+pdf+google+drive` is the primary indicator of malicious intent, suggesting a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://vilenefex.ru/wix?keyword=percy+jackson+lightning+thief+pdf+google+drive PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410986/normal_6052a867ce584.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473410/normal_603a086fa862e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453553/normal_6007dfa7c2776.pdfIn PDF document text
    • http://komamoj.22web.org/demokodidedum.pdfIn PDF document text
    • https://pidolanapeg.weebly.com/uploads/1/3/0/8/130813957/8800226.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527902/normal_60567c46e2814.pdfIn PDF document text
    • https://kasipuxatupar.weebly.com/uploads/1/3/5/9/135966953/bemavirefoporak.pdfIn PDF document text
    • https://gelowabizum.weebly.com/uploads/1/3/1/3/131398428/9587059.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447464/normal_601075d6c927a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466680/normal_605c769420f19.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409801/normal_5ff496d6185e5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wozoxub/80935441850.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/chhatrapati_shivaji_terminus_information_in_marathi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b3ddc6e-bfa6-47ea-bb7e-7dc88367cdb8/bukatusafeluvasixat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/524f1e41-a574-4e57-b5ea-1ebf2c5bb849/list_of_iatf_certified_companies_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a909ab3e-bb56-4292-9176-585fac7a1f2a/que_significa_autorun_en_computacion_byte.pdfIn PDF document text
    • http://juxuvirorut.epizy.com/geometric_sequence_activity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a39d146f-ab1e-46f5-9bbd-e39169b2ac67/49790559540.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/90690357690.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/nerlens_noel_injury_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a16b0895-719c-43d7-8236-2e4f14979d35/gigedalulidufatumax.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_off000108bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BF 5720 bytes
SHA-256: ea13db98626647a485ca6118c1ab6df5445b5c67147802a0ec47500f0c5b63d7
font_01_sfnt_off00011c47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C47 12188 bytes
SHA-256: 627a8ffe1496a5383f187c504cc81a3fa307ccff0ba46e35a2bfd3a1c300248b
font_02_sfnt_off000144f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144F1 17180 bytes
SHA-256: cf8741f820b500519bf2a50f6793c7e60c7ac80be8c8354b1a6c91ebd6f6dc9f