Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ae6d4d3c5dd3d07…

MALICIOUS

PDF

75.0 KB Created: 2020-12-23 19:40:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 41a64d1b28389737fca18cc826561b99 SHA-1: d466ea97fcd3e1c6c76b0342a7e4aa9d48915d35 SHA-256: 4ae6d4d3c5dd3d0716b4dde35eaef8c75a372ac8d545fe48dc465dc9faeb60b8
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The heuristic firings indicate this is a malicious redirector and part of a link farm, suggesting a phishing or malware distribution campaign. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://traffking.ru/strik?utm_term=guess+disney+movies+with+emojis In PDF document text
    • https://cdn.sqhk.co/xakatikakizi/ihiiai2/82671246283.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374986/normal_5f95eb92b867a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373753/normal_5fa876cc07df5.pdfIn PDF document text
    • https://cdn.sqhk.co/wubumeze/ifAichf/buximugezividasadosut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389599/normal_5f8f4ebb0d483.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454988/normal_5fa90ee155e71.pdfIn PDF document text
    • https://gefaturulabi.weebly.com/uploads/1/3/4/4/134487578/jajud.pdfIn PDF document text
    • https://cdn.sqhk.co/ripigopes/gjchiib/sugar_rush_3d_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484633/normal_5fb9fc7790565.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/0233e461-60d9-433b-bcb4-20d5b6cb9e0b/skyrim_alternate_start_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7c6196e-ca2c-49fa-bca9-4535787e873d/rotirasanabobotezojideji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83edbb51-0de1-49c9-92c5-9c115527eb28/i_sing_the_body_electric_short_story.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75c63611-c788-461e-bd48-8a0a487f4135/trailblazer_elementary_school_douglas_county.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_off0000d390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD390 5088 bytes
SHA-256: 5b1f4d780e530661205a6abe9057051da3086d371b965b45cc6ddc65a7e69b28
font_01_sfnt_off0000e4de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DE 10400 bytes
SHA-256: fb56a6b83649b7d7769f296e9b94bf3f3ca8f34edde21c14e4ab937a3717d31c
font_02_sfnt_off00010870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10870 16648 bytes
SHA-256: adfed7caacb8b3dea84e8017144e39a61a8f56fa64757001bacdeb1508980af5

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