Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fd340dbb7ed3298…

MALICIOUS

PDF

78.1 KB Created: 2021-03-24 16:02:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 795143e119653044b24edfb5ba4a565f SHA-1: b9b38eb03aff67fe36beb1a40a3d62323edcdff7 SHA-256: 9fd340dbb7ed329816fa943c29c22857767578ffa24f96ebda9b4fcb19be5375
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. ClamAV detection and ML classification strongly indicate malicious intent. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/award?keyword=rima+consonante+y+asonante+pdf
    • http://samemere.mygamesonline.org/2515677851.pdf
    • https://cdn.sqhk.co/fenazijeguk/rkggvhj/rerevanivus.pdf
    • https://cdn-cms.f-static.net/uploads/4368497/normal_5fd66b7b5a742.pdf
    • https://static.s123-cdn-static.com/uploads/4388613/normal_5ffd7a679475d.pdf
    • http://vuvulusigi.scienceontheweb.net/zufasilatipuni.pdf
    • https://cdn-cms.f-static.net/uploads/4371790/normal_601f0d36352fd.pdf
    • https://static.s123-cdn-static.com/uploads/4412382/normal_6007a950b82d1.pdf
    • http://rifimakegezibor.22web.org/android_studio_gradle_proxy.pdf
    • http://lirinevewafa.mypressonline.com/37865454679.pdf
    • http://nakekizedexu.getenjoyment.net/xuwanupegozojezome.pdf
    • https://cdn.sqhk.co/zubuwebofe/Kidjhhf/55293585556.pdf
    • https://cdn.sqhk.co/zewumabigige/gjdicXd/cyberfootball_fifa_20.pdf
    • https://cdn.sqhk.co/jojikoxazew/OgijfVP/craigslist_atlanta_for_sale_by_owner_furniture.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/883a37c9-1ae7-47cd-b24e-08de081e81fd/speech_milestones_18-24_months.pdf
    • http://bifovigavij.myartsonline.com/how_to_determine_marbles_value.pdf
    • http://vovojoj.atwebpages.com/biodiesel_advantages_and_disadvantages.pdf
    • https://uploads.strikinglycdn.com/files/de7c4de0-8d7e-4377-bb6d-a59a56601a06/linalunujabisoburureros.pdf
    • http://gofozumi.epizy.com/suluvaraletuf.pdf
    • http://nanaxaj.rf.gd/25186585602.pdf
    • http://befokube.rf.gd/towujerip.pdf
    • https://uploads.strikinglycdn.com/files/e4228dbe-2545-44f9-8b5a-729624f639fe/vudepusobozigafif.pdf
    • http://jomimil.rf.gd/59896940757.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1ce.bin
32af97ada5a8ee54219eaefe052d52089706273acd4ab449acc63d86b8b43585
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CE 5284 bytes
font_01_sfnt_off000103c5.bin
fcb96d0d11bdee461b8e272e8378a705284b6bd714fe0e7f91b2da1e84a9cedc
pdf-font-stream PDF embedded font (sfnt) at offset 0x103C5 11644 bytes