Malicious PDF — malware analysis report

Static analysis result for SHA-256 f64361c60a336c70…

MALICIOUS

PDF

76.7 KB Created: 2021-09-24 00:45:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 98a831531462d80db90d286aa41564c4 SHA-1: 5ddbac8008d149ec924213d240fdfa98312f643c SHA-256: f64361c60a336c707bba21dd44d9d1dee103d9fd4546406b9568770dfdaa2781
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. The file's structure and URL patterns are consistent with a malicious PDF used to lure victims to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://abc-tel.ru/data/File/xaxiridanixaxifiximabege.pdf In PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613f4b6ac488c---punugozam.pdfIn PDF document text
    • http://benetworkingpro.com/ckfinder/userfiles/files/zumino.pdfIn PDF document text
    • https://testpensija.bankai.lv/ckfinder/userfiles/files/38659081154.pdfIn PDF document text
    • https://santchavarabed.in/ckfinder/userfiles/files/28005243526.pdfIn PDF document text
    • http://www.ez4parcel.net/upfile/files/2021/09/01/76694458307.pdfIn PDF document text
    • http://wumag.pl/userfiles/file/93129509636.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/fuwebotejetovepub.pdfIn PDF document text
    • http://szm.hu/userfiles/file/ralebojabozomemev.pdfIn PDF document text
    • http://argyleliquidations.com/userfiles/files/fepanafu.pdfIn PDF document text
    • https://fq.ua/images/file/24873647360.pdfIn PDF document text
    • http://ibarugi.com/fckeditor/userfiles/file/91911396435.pdfIn PDF document text
    • http://hit-air.pro/ckfinder/userfiles/files/lurowoziv.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/54727980153.pdfIn PDF document text
    • https://santehsevast.ru/userfiles/files/13713933042.pdfIn PDF document text
    • http://vamaconsulting.sk/userfiles/file/fasiridejaxixonag.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/755e875c0c1b0aa240b0a71f627242ed/520882405.pdfIn PDF document text
    • http://wumag.pl/userfiles/file/wotizejafoxofipasujikef.pdfIn PDF document text
    • http://modelseafarm.com/kweb/ckfinder/userfiles/files/58878663631.pdfIn PDF document text
    • http://alfamar.travelshops.pl/userfiles/file/81460120475.pdfIn PDF document text
    • https://banghenails.com/upload/file/dedamaw.pdfIn PDF document text
    • http://antichigelsi.it/userfiles/files/68628023686.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1614971b300fd8---gifukopoveselosito.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1613bb5e2daf9d---78089615250.pdfIn PDF document text
    • http://appextskihjthj.handylover.com/upload/files/36471990675.pdfIn PDF document text
    • http://lasantitosrestaurant.com/userfiles/file/lalafibo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=megan+is+missing+full+movie+free+english+hdPDF 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_off0000c417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC417 10864 bytes
SHA-256: b6c985a509b8d69b29ccbea29324f02816e3413fdfc6037686eb10e6db629259
font_01_sfnt_off0000dcc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f4db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DB 18528 bytes
SHA-256: 8b3c1a79c1c7b05eae71d8cb8410ec03f1fbc600365b93dd08f1df90005c6eb3

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