Malicious PDF — malware analysis report

Static analysis result for SHA-256 d161add135f09418…

MALICIOUS

PDF

83.7 KB Created: 2021-09-08 23:24:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 42c35f8bd38150ef058327b8cb7ea54a SHA-1: 78fa8e921101b73c0db068595cfdac3e13c6f75e SHA-256: d161add135f09418d15e9e6b0c119b9a8938f042dfc9664e856ad300733b3661
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 http://baaningdoi.com/file_media/file_image/file/lazizuparujuranedetos.pdf In PDF document text
    • http://umrllc.com/userfiles/files/popoxeku.pdfIn PDF document text
    • http://vlajamo.cz/images/file/xojupowafifoxebadolor.pdfIn PDF document text
    • http://murzilka.biz/images/uploads/file/jasitepudud.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133ea1d1ad19---gerusuja.pdfIn PDF document text
    • http://grandviewgroupresort.com/upload/files/94547061736.pdfIn PDF document text
    • http://lnv-cnc.gr/userfiles/file/43447316232.pdfIn PDF document text
    • https://rsvforum.com/userfiles/file/65578627477.pdfIn PDF document text
    • http://rhondadejean.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/64577717790.pdfIn PDF document text
    • http://www.moyekolodin.com/files/javebesovuxe.pdfIn PDF document text
    • http://solmoda.it/userfiles/files/kudegulekipibana.pdfIn PDF document text
    • https://piauiaqui.com/ckfinder/files/lezisev.pdfIn PDF document text
    • http://qiuyutv.com/userfiles/files/20210906042212.pdfIn PDF document text
    • https://kapefashion.com/files/files/85448131280.pdfIn PDF document text
    • http://zkojicin.cz/userfiles/file/4721339924.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.net/ckfinder/userfiles/files/depunarepi.pdfIn PDF document text
    • https://gencshow.com/upload/ckfinder/files/zewunin.pdfIn PDF document text
    • http://halmar.info/userfiles/file/raruz.pdfIn PDF document text
    • http://scouttautomotive.com/editor_uploads/system/files/tukarawazakulitusutoxozev.pdfIn PDF document text
    • https://clove7.com/userfiles/file/16662812638.pdfIn PDF document text
    • http://ksiclubbiz.ksiclub.org/svnprojects/DHD/Source/images/files/bizuxusosajekiwovopule.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=checking+screen+time+on+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_off0000e121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE121 18292 bytes
SHA-256: 6a9cec73cb470d126063e122959456cd251071327d20c128f8c04b7e8e973bff
font_01_sfnt_off0001108a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1108A 10892 bytes
SHA-256: a641b9947f6013a90c3de4be6e3832bab5fd0fa8cc711fffd8c44756f5e43519
font_02_sfnt_off00012968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12968 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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