Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9213c916c82ab31…

MALICIOUS

PDF

72.3 KB Created: 2021-09-26 02:15:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d0775fa7b96756f3b899b78257be6ca8 SHA-1: 5d644370aab73c8d4e5010b535da310e8d2084b2 SHA-256: e9213c916c82ab3127f4942e021af0136d67b150228a89c1434fd2d70a2c8d3a
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which are associated with link farms and disposable hosting, indicating a malicious intent to redirect users. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of external URIs and the link farm heuristic suggest the document is designed to lead users to potentially harmful content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 4

  • 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://synerhu.ru/uplcv?utm_term=file+manager+download+for+mobile PDF link annotation
    • http://myphamlulanjina.com/upload/files/29911432398.pdfIn PDF document text
    • http://sicilalluminio.it/userfiles/files/gajejezorejogax.pdfIn PDF document text
    • https://nationalshield-uae.com/userfiles/files/gonetagobe.pdfIn PDF document text
    • https://maftplayer.net/calisma2/files/uploads/nigefaxekokomipifoka.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/161406f16620a3---71768975926.pdfIn PDF document text
    • http://mydreamtuscanwedding.com/editor_up/larulinexaduteladenowa.pdfIn PDF document text
    • http://gallery4walls.com/upload/editer/file/tuwujufozu.pdfIn PDF document text
    • https://glory-aqua.com/userfiles/file/sufumuzupujuperafuxik.pdfIn PDF document text
    • http://stylekd.ru/files/xomijuramefosoxepoforugaj.pdfIn PDF document text
    • http://onishi-kyosendo.jp/archive/xizomidevotenakamofoxesut.pdfIn PDF document text
    • http://ryyw.com/upload/files/2021/09/202109051951187672.pdfIn PDF document text
    • http://nenayu.com/filespath/files/20210912030234.pdfIn PDF document text
    • https://yuanfuconstruction.com/ckfinder/upload/files/78342750052.pdfIn PDF document text
    • http://www.fuchingrading.com/upload/file/35403784555.pdfIn PDF document text
    • http://busto-wl.gattinonimondodivacanze.it/themes/userfiles/files/33626730483.pdfIn PDF document text
    • http://etalentlink.com/uploadfile/file///2021092319533986.pdfIn PDF document text
    • https://okazionche.com/files/bujaroxonopuni.pdfIn PDF document text
    • https://aristi-trap.com/upload/users/files/87454528038.pdfIn PDF document text
    • http://czernavendeghaz.hu/admin1/file/83055100664.pdfIn PDF document text
    • http://kechengchem.com/upload/files/12709685399.pdfIn PDF document text
    • https://planningpvedh.nl/ckfinder/userfiles/files/moxubap.pdfIn PDF document text
    • https://namkhoasaigon.vn/web/images/files/puwenofosulonokapi.pdfIn PDF document text
    • http://tjsyjdq.com/v15/Upload/file/2021932212358199.pdfIn PDF document text
    • http://dedanskecasinoer.dk/userfiles/file/jinirebekanudufereluf.pdfIn PDF document text
    • http://gotween.com/userfiles/file///zemegibutopupu.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_off0000b68c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB68C 17644 bytes
SHA-256: 357724a3fdb56002dd7e28465a83a0b1e0cf4a96727d4dc0c7f8166f82c361a2
font_01_sfnt_off0000e2ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FF 10636 bytes
SHA-256: d2aed532008a5a0607a4fea8d0eecfbe6f7673ec41e64bcc63c33d9846b881cf
font_02_sfnt_off0000fb11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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