Malicious PDF — malware analysis report

Static analysis result for SHA-256 13f93e1b1329c7dc…

MALICIOUS

PDF

42.3 KB Created: 2020-10-29 15:54:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: a711954262909bc0f18f19ea6425e6f2 SHA-1: 52686d8d1b7b6ac2e8e5e6463e123c7b8af926fc SHA-256: 13f93e1b1329c7dc056a672a0faf23b2711390ed0b00f33018de76651d8a1f85
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. The presence of a 'download button' lure and embedded URLs further supports a phishing or social engineering attack. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector found in the heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://gettraff.ru/aws?keyword=minecraft+the+hidden+versions In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2700/5094/files/makhanlal_surgery_book.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/4th_industrial_revolution_in_telugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63c172fe-4659-47e0-b840-7f2957800a5e/92125416817.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecd2c49d-35ab-4ea3-addf-2b5d9b6b7e56/viwovakuvixuboxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c61cc8f-cbb5-4dd1-ab18-96dab1b5cf24/56547370662.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d75b3349-0d1f-42ff-bcb9-de682790898a/rinetilazixogof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cef21c3-326a-4b8d-be63-98861ebb5428/48663882458.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/975a44f8-eb80-4902-ba2f-1af20b36e613/lisamerezodin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/508b25c5-4ca7-4fff-ae0a-6dbf8db4b9ae/5223248985.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/165c293f-4490-478a-934c-0a37e4bfb05e/sujapirurazupixovo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a9f3c9c-affe-41be-895f-3ba1c30f0f71/79803582867.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c2ac5db-8105-452b-93d0-50ee9d5d2f56/xosorekikipo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/881b8d23-269f-4ed3-bc54-6a546badff2e/vofixebekomo.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C6 5144 bytes
SHA-256: 753b7b180ab8760b0c84bcb7c0ced8416ee2900367c8c663d2472e150f04d200
font_01_sfnt_off00007654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7654 11220 bytes
SHA-256: 1e19d6a1cdeda35fba8a284f52dfd6295480843be4443d7d4767c2199ab480e0

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