Malicious PDF — malware analysis report

Static analysis result for SHA-256 b030d6279e8024c3…

MALICIOUS

PDF

73.0 KB Created: 2021-09-04 10:31:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 896e426dea5636d255f810f4dcd2296d SHA-1: 8d8cc39b0776fc99837f67ee4b171a09175c6bfb SHA-256: b030d6279e8024c3db7300f3c456bc22afedb79c141402d8f8c5855020fb03e0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs, many of which point to compromised websites or are part of a link farm designed to obscure the true destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of compromised CMS upload links suggests an attempt to host malicious content or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://jullien38.com/ressource/site-image/files/sotomuzefexid.pdf In PDF document text
    • http://garmagostaran.com/Upload/file/66146911700.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa3795a80a---mubujusunepajijefapewis.pdfIn PDF document text
    • https://ekransamara.ru/files/7539547057.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/45842952255.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd4f9a0939f---togukirud.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608aedc58226b---27928523213.pdfIn PDF document text
    • https://barrierball.cl/ckfinder/userfiles/files/17600938081.pdfIn PDF document text
    • http://emurus.jp/userfiles/file/raserojodatixazaru.pdfIn PDF document text
    • http://redtopmarina.com/clients/7/72/7297c65379f6126c97b8b18e62fd1dd4/File/69053003821.pdfIn PDF document text
    • http://abwingsmd.com/uploads/files/6593796736.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/60915611913.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/gulumowitakuxitex.pdfIn PDF document text
    • http://huile-de-nigelle.info/userfiles/file/958814683.pdfIn PDF document text
    • http://haustechnik-hagenauer.at/rakaxosegomaxuzebidujo.pdfIn PDF document text
    • http://opuspoint.com/ckfinder/userfiles/files/ligade.pdfIn PDF document text
    • http://mastera-mix.ru/ckfinder/userfiles/files/zarakuv.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd2741d5d1b---38750139809.pdfIn PDF document text
    • http://residenceraffaellotorino.com/userfiles/files/24306381117.pdfIn PDF document text
    • http://miyozenemeryville.com/uploads/files/nalibun.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/bnvbtqdhcdgerqc5lai8q4tmmc/vupimamikaxavixin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=simple+house+plans+free+pdfPDF link annotation
    • 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://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_off0000bc1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC1B 10840 bytes
SHA-256: 1bbb0d36d95585c77593baf550efd3dea66d898a088176343bdf4c1341739afb
font_01_sfnt_off0000d4cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CC 16448 bytes
SHA-256: 8644d1f8a96ae8e533ca054bbddb04c944bb85b5223e9fc5b61bdc9b764cb99f
font_02_sfnt_off0000feb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1