Malicious PDF — malware analysis report

Static analysis result for SHA-256 80010b948f082a5d…

MALICIOUS

PDF

131.9 KB Created: 2020-05-24 03:03:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 442b911189d65e900fd9b69e2eedb11f SHA-1: 4ed6211623017c68e0183ab82264569be61ca3a8 SHA-256: 80010b948f082a5d4072f42570b56bd1944b8e585e527481584aa42f4c2683ef
96 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are structured as a link farm, suggesting a malicious intent to redirect users to potentially harmful websites. The document body, though heavily obfuscated, contains text related to 'Hsc result 2019 dhaka marksheet' and embedded URLs, reinforcing the lure. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://bilunjii.trevelle.com/uploads/1/3/0/9/130969655/130969655.html#hsc+result+2019+dhaka+marksheet
    • http://rahimmandal.com/uploads/1/3/1/4/131482926/26000b2.pdf
    • http://catholicfamilymission.com/uploads/1/3/0/4/130476060/jupeka.pdf
    • http://umkangen.com/uploads/1/3/0/6/130621215/43465260b1ded7.pdf
    • http://availableear.com/uploads/1/3/0/9/130969002/zizotaduj.pdf
    • http://protectyourdestiny.com/uploads/1/3/0/5/130542934/litazev.pdf
    • http://imedregeneration.net/uploads/1/3/0/5/130545199/175f55b3c3e.pdf
    • http://homeandnursery.com/uploads/1/3/0/5/130589423/297284d623d7.pdf
    • http://quiltedapronboutique.shop/uploads/1/3/0/5/130589391/tigivokilezesuriz.pdf
    • http://aleksandrajoy.com/uploads/1/3/0/4/130476074/8603575.pdf
    • http://bagsandkeys.com/uploads/1/3/0/5/130551728/1812688.pdf
    • http://speelkoning.net/uploads/1/3/0/7/130775542/5250141.pdf
    • https://educationboradresults.gov.bd
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000191ca.bin
61da1f0f59218e525d5c58b6d14bbe583185e7d11ed511d9cf72e6a72c022216		 pdf-font-stream PDF embedded font (sfnt) at offset 0x191CA 30588 bytes
font_01_sfnt_off0001de4c.bin
05bbc3d2e2ab22276ef5f5a60639fca47095e979c4c8e67eb8486ce6680f5e12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DE4C 11328 bytes

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