Malicious PDF — malware analysis report

Static analysis result for SHA-256 2405db01a28bdbdf…

MALICIOUS

PDF

52.2 KB Created: 2020-11-01 22:46:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: addb7a82226cbd657555b30fb6de48ec SHA-1: 911fb417d980bbceaf8f33260dd937cdd00df0e6 SHA-256: 2405db01a28bdbdfbacabc533cce834ea4397c18313a42e9cccbc58968dd02d5
102 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses an urgency-based lure. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ttraff.com/123?keyword=gmail+hosting+cost In 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/44d22346-59b4-4c2a-b458-144f6b2a50d2/3357511911.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c23281c-a983-4bc4-824f-cd4c9c398e78/kamilesogaloranakopividi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c564fca6-ca5c-47ab-b103-bc38d414bfc8/xixivewamimitekefomuj.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/vanulefipudupu.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/wisamitofepetubukurudol.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/bomafor.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/high_school_for_environmental_studies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11517413-8468-423a-bb78-ac1f5800e932/28540598538.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23a005b0-e273-4e59-9ee6-37ddce7fda66/sivebuletodapupe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7121fcc9-88d6-41c2-998b-cb05fc18c6cc/9844427746.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3672c990-46f4-4205-87c1-5a63eff25c97/37910160007.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/laser_touch_one_for_wrinkles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b7d740c-c7ff-4c3e-a7bc-3720b6f0fe10/nosijijezatebow.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/pelicula_escritores_de_la_libertad.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_off00006fde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FDE 5148 bytes
SHA-256: 3f3f1066c55b5d560236d9446b392a446bd0971a50755ef7581b639c00326e70
font_01_sfnt_off0000813c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x813C 10704 bytes
SHA-256: 7e1c3459aca309d0dc51d7d33fb713da8f0d8cb218dec4bfb4594d0cc82d18a4
font_02_sfnt_off0000a5df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5DF 18652 bytes
SHA-256: 0ecdd54713b28d95f6c6da39b0ec0c61e69f127baadee74275e6d607898ddce5

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