Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5bab5cd11d9d82a…

MALICIOUS

PDF

51.2 KB Created: 2020-10-27 01:48:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 824dfc5ba3abefcde566419af349d4b3 SHA-1: 535e5b616e0f9b5d94c201e6900e363c64c46cca SHA-256: b5bab5cd11d9d82a598e84782d37b40ec2badfc37cfbbe565ad4f0849ceed6c3
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with text related to rehabilitation. The ML classifier strongly flagged this PDF as malicious, and it contains a large number of embedded links, many pointing to S3 buckets, suggesting a link farm or SEO poisoning attempt. The embedded URLs are likely used to redirect users to malicious sites.

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.
  • 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://ttraff.me/123?keyword=rehabilitation+model+of+corrections In PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/9470675.pdfIn PDF document text
    • https://gexirirexov.weebly.com/uploads/1/3/0/8/130874239/cebb0.pdfIn PDF document text
    • https://lewejasolon.weebly.com/uploads/1/3/1/4/131437246/a7fc84e6fc0546.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/zamupudebomimaze.pdfIn PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/6ddc7e2e54594.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/8f57fed01987.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/2475735.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/subud/fmea_4th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/a4_size_paper_border_designs.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/luzesiwewuwusetogige.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/reading_comprehension_intermediate_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/gimozojox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9669/7768/files/android_tv_box_remote_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a3e1b7f-de2a-4b4f-a545-8f0a81b0ebb7/53412963382.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5028ace9-0f07-4e61-9b00-92ff48d0fccb/11209681624.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf2d4e16-2943-462c-bfa1-de4f1216ea0a/74162534757.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd3faf32-8352-474e-8230-ddb59332e126/pepinevajekuxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df1612fa-bc37-4fe6-906d-4a6e8c2c86ab/wedokukuforulukurunari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e122549-1ab8-4083-a213-9cd5c35fb2ba/misirimavanuvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fda8dd5-11a9-4cc9-9e15-9b10f0cc9727/63220874692.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_off00008614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8614 5408 bytes
SHA-256: 6d4d474acca025a54abfb2a707077e88e199459b5d3330738be97eb0bc5eb076
font_01_sfnt_off00009847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9847 11392 bytes
SHA-256: bf8e78afd62b2b340489c105e1984051bbef51c46c371588cb35910d7598e64f

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