Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dacea0d0089503c…

MALICIOUS

PDF

74.6 KB Created: 2021-09-23 10:07:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2c406197b05010090fa8362c54acc28c SHA-1: f2685fb80536bb85e9fc3710bd8d5791711f508c SHA-256: 9dacea0d0089503cb1d81582765ad259bea3dffa4510d6c82751e4a7062e88b3
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. The ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the presence of many external links suggests an attempt to redirect users to potentially malicious sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pixomot.ru/uplcv?utm_term=need+for+drift+most+wanted+mod+apk PDF link annotation
    • http://americandeliorder.com/uploads/files/27204987319.pdfIn PDF document text
    • http://xaydunglenguyen.vn/upload/files/ac7ea4.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/10667149703.pdfIn PDF document text
    • https://egokituz.eus/files/galeria/files/57124945417.pdfIn PDF document text
    • http://gruppocreta.com/userfiles/files/58793453229.pdfIn PDF document text
    • http://licausi.it/userfiles/files/vudolafonimofelani.pdfIn PDF document text
    • https://funbugs.ie/files/file/favelinotanexeneduzej.pdfIn PDF document text
    • https://torgradio.ru/new/files/file/18871165985.pdfIn PDF document text
    • https://nhabe.com.vn/ckfinder/userfiles/files/69881603174.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/66072068956.pdfIn PDF document text
    • http://tcsklife.com/filespath/files/20210917235448.pdfIn PDF document text
    • http://cleanyachts.it/writable/public/userfiles/file/59082471460.pdfIn PDF document text
    • http://www.louisianarebarcontractor.com/editorimg/file/8812352829.pdfIn PDF document text
    • http://dichvuhangngay.vn/uploads/image/files/tuvorafemunor.pdfIn PDF document text
    • http://radissonhoteltraining.com/userfiles/file/bagosejewenetoju.pdfIn PDF document text
    • http://hotelgiottotorino.com/userfiles/files/30414690833.pdfIn PDF document text
    • http://fsanaq.com/upload/file/2109120156098828777275y6wgctew.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/9339294264.pdfIn PDF document text
    • http://elektromig.pl/userfiles/file/fuduxepata.pdfIn PDF document text
    • https://szallas-karpatalja.com/upload/18684032839.pdfIn PDF document text
    • http://jinistudy.com/_UploadFile/Images/file/retopame.pdfIn PDF document text
    • http://kondicionery-lobnya.ru/upload_picture/file/6417792728.pdfIn PDF document text
    • http://sweethomedelivery.com/ckeditor/ckfinder/core/connector/php/uploads/files/lukimililiforar.pdfIn PDF document text
    • http://aligokdemir.com/resimler/files/widit.pdfIn PDF document text
    • https://landatur.com/files/galeria/files/2958851387.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_off0000b8e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8E4 18792 bytes
SHA-256: 15ccc3ee94c255ab9873ed96d87789f0606e65c5673233c57f743a82fabb2383
font_01_sfnt_off0000e973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE973 10768 bytes
SHA-256: ad6aea7325ddf8baded5293604b24c5bb60b7937c7bad43b79150f13f32e12f6
font_02_sfnt_off0001024f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1