Malicious PDF — malware analysis report

Static analysis result for SHA-256 49e4ce4115e8e2c0…

MALICIOUS

PDF

69.1 KB Created: 2021-09-18 15:11:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 714c27eef0acf49398d60238cc6eb6df SHA-1: 789f5b547f23b38d665a4e91a661662d892b35ca SHA-256: 49e4ce4115e8e2c0b4488695284b99b924e4fd1180df795aabd0907cd28d21ed
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external domains, with one URL specifically mentioning 'video file converter free download', suggesting a lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of hosting many links on disposable domains, often used for malicious purposes. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://crewmak.ru/uplcv?utm_term=video+file+converter+free+download PDF link annotation
    • http://bertrandetgastineaudesigners.com/userfiles/file/turutazinixotawu.pdfIn PDF document text
    • http://izeninfo.net/admin/upload/files/70150228987.pdfIn PDF document text
    • http://unsersohn.com/images/file/42830248579.pdfIn PDF document text
    • https://mimpishiosatu.com/contents/files/48214898224.pdfIn PDF document text
    • http://seattleteriyaki3.com/uploads/files/10700997734.pdfIn PDF document text
    • https://millinerandassoc.com/files/file/xifedewigujideliro.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613e427becd2e---tuxoderuroti.pdfIn PDF document text
    • http://pscemetery.com/userfiles/file/1024234339.pdfIn PDF document text
    • https://icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/73291130459.pdfIn PDF document text
    • http://ekonopuntos.com/campannas/file/47316385108.pdfIn PDF document text
    • http://sushiloverca.com/uploads/files/kozasofefujomakom.pdfIn PDF document text
    • https://jamuiboe.com/webroot/upload_media/59241816798.pdfIn PDF document text
    • https://highlander-inn.com/assets/userfiles/files/xefoxu.pdfIn PDF document text
    • http://mecaniquekd.ca/upload/file/40483586996.pdfIn PDF document text
    • https://xn--p3t29jo1ed4o4xw.tw/upload/files/16211206099.pdfIn PDF document text
    • http://quangphong.vn/uploads/image/files/87101448566.pdfIn PDF document text
    • https://xyoaa.org/sites/default/files/files/76312953030.pdfIn PDF document text
    • https://attackworkoutprogram.com/app/webroot/files/ckfinder/userfiles/files/zoxonivevilarumafoligav.pdfIn PDF document text
    • https://cyc-catering.pe/disac/userfiles/file/30613306516.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f6cbdf5822e30c970465e06816c30c51/25841965816.pdfIn PDF document text
    • http://mebizstekla.ru/userfiles/file/pepulobajiwemapagabalim.pdfIn PDF document text
    • http://www.pacautomarketing.com/file/rudagisorazudakabidi.pdfIn PDF document text
    • http://tiszaikaland.hu/upload/file/sepudevug.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB096 10424 bytes
SHA-256: fbf86be5c781d5467ff1c4387d562ee1c16a99c4ce84575ea006bccd8d975347
font_01_sfnt_off0000c859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC859 15244 bytes
SHA-256: e8fb5b8bd5ceafa6af63dfdf78cd47c2cdbdcd660378edc9f2e23d5469773f1c
font_02_sfnt_off0000ef0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1