Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c9ea340171be073…

MALICIOUS

PDF

88.9 KB Created: 2021-07-09 09:59:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 92cffd4cb6964f01647b8431dde88b26 SHA-1: c077197ed2d43c3662aafa260bb47eb12f29eeff SHA-256: 1c9ea340171be073c079ac142f771118d1e6abd417781530d0ee5d4c2d41bc3a
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file exhibits characteristics of a malicious document, including a high ML classifier score and the presence of numerous external links, many pointing to compromised CMS uploads and disposable hosting. The 'SE_DOWNLOAD_BUTTON' heuristic suggests a deceptive call-to-action, likely intended to trick users into downloading a secondary payload. While no scripts were directly extracted, the overall structure and link farm indicate a probable attempt to distribute malware or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://oniceh.ru/uplcv?utm_term=new+tamil+movies+2019+download PDF link annotation
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/64447482907.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/2394c52005f9952cc7a4bdd56943bfe6/29683549231.pdfIn PDF document text
    • http://verypool.cn/images/upload/File/gizedejigesejidakitew.pdfIn PDF document text
    • http://zzweien.com/d/files/sifozudomusetas.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/58688153138.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/12959577126.pdfIn PDF document text
    • http://elmbbq.com/uploads/files/82021613977.pdfIn PDF document text
    • http://ytbozhuo.com/upload/file/300247068535.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/435a3d9ad973b40bcecf40d95b1e930d/xuvibutivimirupaz.pdfIn PDF document text
    • https://hijaulumut.com/contents//files/savolavi.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ac063f02bb5---52823011327.pdfIn PDF document text
    • http://xedaptap.net/userfiles/file/guxaremew.pdfIn PDF document text
    • http://venusland.vn/app/webroot/img/files/62749159546.pdfIn PDF document text
    • http://redigonda.it/userfiles/files/bokiletawozopeketuxafa.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/c3rvba63a7mop62tofckm812ht/jifijugujuriwobu.pdfIn PDF document text
    • http://haiphongcontest.com/images/files/24509731883.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160adf133c55d6---21088283562.pdfIn PDF document text
    • http://pinxedien.net/upload/files/fizupe.pdfIn PDF document text
    • https://censcakmu.org/board/file/files/tasewojunosavujiw.pdfIn PDF document text
    • https://gastrotest.co/ckfinder/userfiles/files/xoxepatejasufax.pdfIn PDF document text
    • http://ldbell1965.net/clients/85689/File/13320387547.pdfIn PDF document text
    • http://eperon-kochersberg.com/img_db/lewupajuwuguwalotawe.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc361431c8---24061712738.pdfIn PDF document text
    • https://nonbodepsg.com/uploads/files/95200534915.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF767 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010f79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F79 17404 bytes
SHA-256: d48e00e9730a4bd70c28491ba95a471bd8ad934241152ef2a150deeb3cd98fe5
font_02_sfnt_off00013cd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CD3 10900 bytes
SHA-256: 2831dfba63814f71c908386b29f0988837eb827295aaf6f44abfb7b81143015f

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