Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dc8463aa26445b7…

MALICIOUS

PDF

82.2 KB Created: 2021-09-23 07:36:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a30c6f529d332c121a835c58d2849efb SHA-1: a6ee7900a5069b4e9fe3fa4ca7d5a6b0eee0d534 SHA-256: 8dc8463aa26445b7afb3ef2f72aa75f58cf8035061efed85ae2e23e5d17e47bd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to suspicious domains and are likely used to redirect users to phishing or malware hosting sites. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic further suggests an attempt to obscure the true destination of these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://fleuriste79.fr/ckfinder/userfiles/files/dalux.pdf In PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/97e30102a7c957e00eb3862614155ff4/79689485109.pdfIn PDF document text
    • https://servingltda.com/userfiles/file/livoluzumi.pdfIn PDF document text
    • https://namhunglogistic.vn/site/files/dalolum.pdfIn PDF document text
    • http://areaengineeringsrl.eu/userfiles/files/56876491421.pdfIn PDF document text
    • http://xn--oy2b19v1mb1yi.com/userfiles/file/52767124534.pdfIn PDF document text
    • https://y3stwk65l-mn9.com/contents/files/36928407118.pdfIn PDF document text
    • http://dpnovelty.com/upload/files/70579853525.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/24540964892.pdfIn PDF document text
    • https://marblobaths.ph/app/webroot/img/files/63093926506.pdfIn PDF document text
    • http://westfallassociates.com/documents/file/tatolanobuto.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613404dd3b9ea---xutarinokexo.pdfIn PDF document text
    • http://autosvilar.com/uploads/ckfinder/files/zojijobef.pdfIn PDF document text
    • https://gesema.com/UserFiles/file/44416762357.pdfIn PDF document text
    • http://collegium-connect.nl/ckupload/files/lonezafuzu.pdfIn PDF document text
    • https://chanty.dacola.com/upload/files/zetaza.pdfIn PDF document text
    • http://chinalanpa.com/images/upload/File/61655971110.pdfIn PDF document text
    • https://torgradio.ru/new/files/file/rutub.pdfIn PDF document text
    • https://aneri12.cz/res/file/5684295080.pdfIn PDF document text
    • http://watch62.ru/files/files/kusixazofoxe.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/21624167682.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=aplikacja+telefon+na+androidPDF 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_off0000dea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B3 17636 bytes
SHA-256: 1c3a4358afff4bd4da4d7471691e27875a1aaa6a3f234021709b5d5e445fb44d
font_02_sfnt_off00012326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12326 10648 bytes
SHA-256: 402a3433f7565c8068b76cfd07ea3c05464de132a598d68cb6d216cc2f3509c3

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