Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab1714afdd373f25…

MALICIOUS

PDF

79.0 KB Created: 2021-09-11 07:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 25ff858ac502e38de35a0a2a2c44cd5b SHA-1: f7f1c4f40c6192f66f39d7faec61a6ed49e0c4d7 SHA-256: ab1714afdd373f25289218399add411e6089bdda14d7c544cf7aef267353ed03
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. The document contains numerous embedded URLs, many of which point to link farms on disposable hosting, suggesting an attempt to redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate effort to create a deceptive web presence for hosting malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://wastran.ru/uplcv?utm_term=download+cheat+hungry+shark+android PDF link annotation
    • http://poorclarescork.ie/images/55881599584.pdfIn PDF document text
    • https://ymvii.com/admin/upload/files/gojabedutipa.pdfIn PDF document text
    • http://szerecsen.hu/editor_up/86254500322.pdfIn PDF document text
    • http://turnwealthy.com/ckfinder/userfiles/files/bijeduwemegojitodezizevo.pdfIn PDF document text
    • https://izyskately.ru/foto/ck/files/68450038369.pdfIn PDF document text
    • http://theofficeplus.com/userfiles/file/86548589109.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137817de832b---78994163839.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/fjigugiv4enuhe5vcc33cjvj6h/tiramogojidoni.pdfIn PDF document text
    • http://thucphamchucnangmy.vn/uploads/files/14927136018.pdfIn PDF document text
    • http://pass38.com/images/contentimages/files/ridofipiribugunulakew.pdfIn PDF document text
    • http://blueleaves.ru/userfiles/file/zuwij.pdfIn PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/64893304091.pdfIn PDF document text
    • http://engcaphone.com/_UploadFile/Images/file/besogivajuwidikal.pdfIn PDF document text
    • http://helder-effect.nl/userfiles/file/92114976586.pdfIn PDF document text
    • https://sunkamalzemecilik.com/userfiles/file/sonupix.pdfIn PDF document text
    • https://0900107678.com/upload/file/38776107154.pdfIn PDF document text
    • http://k12kos.com/ckfinder/userfiles/files/77284352366.pdfIn PDF document text
    • http://www.gc-antey.ru/ckfinder/userfiles/files/59587999746.pdfIn PDF document text
    • http://lezeckastenakosice.sk/upload/files/51454170644.pdfIn PDF document text
    • https://izyskately.ru/foto/ck/files/mifuroxusevebepewu.pdfIn PDF document text
    • http://thibidi.vinadesign.info/uploads/images/files/6537277302.pdfIn PDF document text
    • https://cezartravel.hu/userfiles/file/22877586968.pdfIn PDF document text
    • http://france-ex.com/images/blog/file/10708677040.pdfIn PDF document text
    • http://greenbrier101.com/userimages/72867060241.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD099 16936 bytes
SHA-256: 653985b173bb93136c8c8c99e5dc89e293540c153c07f2fe2baf41d10720f0d8
font_01_sfnt_off0000fc99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000114b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B0 11044 bytes
SHA-256: 04cc2d4b50ba9727acf5c32f6417fbf79cf1229c729930b1210529f3ed6eac24

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