Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2818225c9dd8d44…

MALICIOUS

PDF

90.9 KB Created: 2021-09-22 16:55:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d79eeccfdad55f8c33171475a9d7db76 SHA-1: 1f99b0a7a587dd6617149c32ee007355e5b84876 SHA-256: a2818225c9dd8d44b197f76dd5e43027e205bbea0779fbdb52f2c2df99e8526d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://fedime.org/imagenes/pudamaso.pdf In PDF document text
    • https://oreopay57.com/ckfinder/userfiles/files/garorovokolejup.pdfIn PDF document text
    • http://uteambio.com/upload/files/26098547935.pdfIn PDF document text
    • http://meuble-tunisie.com/userfiles/file/fasokojanexib.pdfIn PDF document text
    • http://mrtowing.ca/Lawyers/userfiles/file/45258891539.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16141e5e5807f4---10293525222.pdfIn PDF document text
    • http://www.parkwaytransplant.com/media_upload/upload/files/13870344743.pdfIn PDF document text
    • http://oipipleszno.pl/userfiles/file/23654811858.pdfIn PDF document text
    • http://iuf.kr/pds_down/files/80306081565.pdfIn PDF document text
    • https://geniodelweb.com/file/61700032938.pdfIn PDF document text
    • http://novichiha.ru/pic/file/59159014885.pdfIn PDF document text
    • http://betheaskssd.com/flash/betheaskssd.com/file/wavojotagonexiveke.pdfIn PDF document text
    • https://nsstore.mx/ckeditor/ckfinder/archivossubidos/files/54323629707.pdfIn PDF document text
    • https://tapuionoticias.com/ckfinder/files/9118243508.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/vcoqlqmgum9ioo66h4m6udjo31/fowizuzo.pdfIn PDF document text
    • https://abouelhoulgroup.com/userfiles/files/wezibamajil.pdfIn PDF document text
    • http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/budawerusuzukotuzififujif.pdfIn PDF document text
    • http://jakpaisanestate.com/images/upload/files/44231213063.pdfIn PDF document text
    • http://taociren.com/upload/file/21091207140969537681pc5jem7fp1.pdfIn PDF document text
    • https://aordonez.com/images/contenidos/files/xamugokupugajepobo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=free+movies+firestick+cinemaPDF 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_off0000fe24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE24 10588 bytes
SHA-256: 6fb849273fdaeaeb232a7368d198cd1cb783a2e755f836193389eec55a8d4ce0
font_01_sfnt_off0001165b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1165B 18228 bytes
SHA-256: 6666a2438074dbfe55b6720f1103fd2b947f7b051be1bfc2cf024da13425f702
font_02_sfnt_off000145bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.