Malicious PDF — malware analysis report

Static analysis result for SHA-256 17854dca669dd8c6…

MALICIOUS

PDF

73.7 KB Created: 2021-09-12 10:02:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9329140b02620ee7417d6efbe8bef164 SHA-1: 5aed5596fc01e49cd0a20e0329b9c4a71b8339fa SHA-256: 17854dca669dd8c664ff121d14d824f8f918b21cb22129143b6280f2ae5cb91a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. It contains numerous embedded URLs, suggesting it is designed to redirect users to malicious websites. The presence of external URIs and a link farm heuristic indicates a strong likelihood of phishing or malware distribution as the primary attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://pixomot.ru/uplcv?utm_term=android+tv+emulator+for+windows+10 PDF link annotation
    • http://accapierre.it/userfiles/files/vovebe.pdfIn PDF document text
    • http://bienbao.org/uploads/files/safokabadasobutegiwomev.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/8357040146.pdfIn PDF document text
    • https://serviceservice.eu/userfiles/file/tiduduribodades.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613afcc8caf80---60408762744.pdfIn PDF document text
    • http://imhang.com/fckeditor/userfiles/image/jenuwoxugegixorelutawij.pdfIn PDF document text
    • https://www.fishhabitatnetwork.com.au/application/third_party/ckfinder/userfiles/files/gumafezom.pdfIn PDF document text
    • http://geologicatoscana.eu/userfiles/files/kelafad.pdfIn PDF document text
    • https://dalnoboy.com/data/filestorage/upload/files/kaxarodevujape.pdfIn PDF document text
    • https://fullprotec.com/ckfinder/userfiles/files/rotazafivupoguxixiboxe.pdfIn PDF document text
    • https://suksesunited.com/contents/files/89241340747.pdfIn PDF document text
    • https://harshahometutors.com/uniformkontakt/userfiles/image/files/54875876679.pdfIn PDF document text
    • https://alistairmills.com/ckfinder/userfiles/files/zerenubezirisozaj.pdfIn PDF document text
    • https://biroestarsa.hu/uploads/file/31223834606.pdfIn PDF document text
    • https://adikmanis.com/contents/files/94458811692.pdfIn PDF document text
    • https://poldercuptrofee.nl/site/admin/ckfinder/userfilesfiles/baborixuwuwuzedowedoz.pdfIn PDF document text
    • https://cvssteelex.com/ckfinder/userfiles/files/widapupomizaxiw.pdfIn PDF document text
    • https://htapigroup3.com/contents/files/71065350343.pdfIn PDF document text
    • http://adriennemason.com/assets/files/darexe.pdfIn PDF document text
    • http://datatalk.ilvzhou.com/upload/files/2021/09/202109032223088201.pdfIn PDF document text
    • http://p-itos.net/admin/userfile/image/file/jigafofosatawukafos.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_off0000bd15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD15 10924 bytes
SHA-256: 3ef23c6173bee5f062123666d3039b79b2dc80cdb01bebb6b2f3d15706775e30
font_01_sfnt_off0000d67a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67A 16828 bytes
SHA-256: 179911c0b008e58bd2a402879507a646875c9dba2577c3785002ae8c16131d9b
font_02_sfnt_off00010154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10154 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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