Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6f483c354e8f602…

MALICIOUS

PDF

72.1 KB Created: 2020-11-22 03:10:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a758b6b9f19d07a6ea6a8f5b4c799c28 SHA-1: 97a2690e6e72bc4dd8ced2d97bbdd798fcab5fe0 SHA-256: e6f483c354e8f60235710fcdc5d1c15bbee54cdae3cdd18c17f4a8e5f0557f07
222 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffine.ru'. This, combined with the ML classifier and ClamAV detection, strongly indicates malicious intent. The document body, though heavily obfuscated, contains text related to 'leo playcard apk', suggesting a lure for potentially unwanted applications or further malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • 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://traffine.ru/123?utm_term=how+to+use+leo+playcard+apk In PDF document text
    • https://zuzilenew.weebly.com/uploads/1/3/4/5/134527977/54b6aca0035.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc87b084-2d02-4450-b858-204a2414d9e7/link_ci_t_alitoolbar.pdfIn PDF document text
    • https://s3.amazonaws.com/pojojagajevuxa/76409758727.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b45ad652-dc3e-4ed9-9baa-b6a4f2843535/the_nutcracker_music_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4d2fe13-e92c-4b65-828f-d69942397624/carlos_castaneda_las_ensenanzas_de_d.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca26c729-0d75-475b-bc0f-72834b5e93e5/89956757348.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f212a50b-caed-4781-9d2c-a1099f581720/legal_seafood_hingham_ma_hours.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56abcaf1-ebb2-43c3-878c-49ad2b0b54a2/kojofudirodupodenofejobu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03b167b2-90ba-4ce2-9eed-627a094a5ed6/does_mr_poe_cough_because_he_lit_the_fire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d367fe1-3157-49fb-ba2b-0f094cc9b1da/wma_rogers_nickel_silver_knife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/364d23df-bf2a-4d06-a3cd-ccfb8676496d/fosofajuzinavelatatorex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/314b55c7-8595-4eae-abe1-1bd93df2ec46/3831115308.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/bagunurazuzin.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://scripts.sil.org/OFLIn 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_off0000c9be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9BE 5288 bytes
SHA-256: dbf1a38988319643d92f1f4b4e85f53d253137a1b754d4c93f843e88572a0896
font_01_sfnt_off0000dbda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDA 10256 bytes
SHA-256: b9deda7d1b649ad9f513f76ee811200f64037beca83eeb1287a02b50a7aad0d6
font_02_sfnt_off0000fe92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE92 16144 bytes
SHA-256: f6e0f4a25f18a144688c6b7f40519a5efc98c72643b9054f89526e396d9b459d

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