Malicious PDF — malware analysis report

Static analysis result for SHA-256 dde7deee58cb3a8a…

MALICIOUS

PDF

80.3 KB Created: 2021-09-16 19:22:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 84b1f497ab88bb7097c776a43a1183b8 SHA-1: 2a5f2aeb304870ad8ebff1613483d9fc8e8573cf SHA-256: dde7deee58cb3a8a54fbc23e065eab5d75aaaf5175800ab38c227e6cad1675fc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, likely for SEO manipulation or to distribute further malicious content. The embedded URLs, despite some being marked benign, point towards a phishing or content-luring scheme, potentially related to movie downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://tsegypt.com/file/fituzibonufefurik.pdf In PDF document text
    • http://riccaassociati.eu/userfiles/files/95183313010.pdfIn PDF document text
    • https://art4you.sk/editor_uploads/system/files/53063292806.pdfIn PDF document text
    • http://alfonsoguiggiarchitetto.it/userfiles/files/57963816100.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/8a5b9bf4920553d06b03211aa16f2ec9/3930022318.pdfIn PDF document text
    • https://cplastik.com/data/cms/file/jewutikixugajil.pdfIn PDF document text
    • https://yukkumpulgroup2.com/contents/files/kupumapiterebosulas.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/54270300643.pdfIn PDF document text
    • http://air-ned.com/uploads/files/wagupagozoj.pdfIn PDF document text
    • http://geriatriccarenewjersey.com/userfiles/files/90794423617.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/pejolu.pdfIn PDF document text
    • http://tchid.net/userfiles/file/xefojotomebosoroveli.pdfIn PDF document text
    • http://choragwica.pl/userfiles/file/74272892510.pdfIn PDF document text
    • http://goodwill.pl/userfiles/file/jekibiwi.pdfIn PDF document text
    • http://luligang.com/ckfinder/userfiles/files/rixifamaxomes.pdfIn PDF document text
    • http://konsultacjenaukowe.eu/Upload/file/metamezexidugad.pdfIn PDF document text
    • https://www.winsum.frl/ckfinder/userfiles/files/watabuwemegewizozasofi.pdfIn PDF document text
    • http://entrackintl.com/uploads/34481009231.pdfIn PDF document text
    • http://reafamily.lt/ckfinder/userfiles/files/zirejomakonosonidup.pdfIn PDF document text
    • https://carcarnet.com/home/sandbox/domains/hkdance.tritek.hk/public_html/ckfinder/userfiles/files/75969502359.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/ftf5ga7hv90hllhha9ddimdb2u/25302288208.pdfIn PDF document text
    • https://ww150005.linebot.net/upfile/files/20210904223021.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/63344751418.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=boss+full+movie+online+freePDF 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_off0000d753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD753 17424 bytes
SHA-256: 79101556ddcf49554e7637f01f971da00b7192ef8ca720d424bc24e817404944
font_01_sfnt_off00010406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10406 10336 bytes
SHA-256: dddc1f0596933a8a22f564f9a32604641012d8cad4d13cd99b416ddd96b5076f
font_02_sfnt_off00011b57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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