Malicious PDF — malware analysis report

Static analysis result for SHA-256 41a88483bf53e694…

MALICIOUS

PDF

31.3 KB Created: 2020-06-02 08:10:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4b9f8762b8bf45fd1ced83ebb91d5c6 SHA-1: 2c4fc456ed78a5e14110684067f48b5cdbcb3c4d SHA-256: 41a88483bf53e694244b1c512770aef861429cef77089aceda1079779c75a738
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, many of which point to domains that appear to be part of a link farm. The document body, though heavily obfuscated, contains text suggesting it is a printable world map. The primary intent appears to be directing users to a network of websites, likely for phishing or to host further malicious content. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://9l6v0m.bdgct.com/uploads/1/3/0/4/130477293/130477293.html#carte+du+monde+%25C3%25A0+imprimer+pdf
    • http://mayofamilyeyecare.net/uploads/1/3/0/8/130813869/1429839.pdf
    • http://services-for-seniors.com/uploads/1/3/1/3/131384128/3566331.pdf
    • http://strategiesforwriting.org/uploads/1/3/0/5/130550666/1087768.pdf
    • http://tobywood.com/uploads/1/3/1/3/131397964/2454470.pdf
    • http://haleycbrackmanfuturepa.com/uploads/1/3/1/4/131406118/3751343.pdf
    • http://9l6v0m.bdgct.com/uploads/1/3/0/4/130477293/terms.html
    • http://9l6v0m.bdgct.com/uploads/1/3/0/4/130477293/dmca.html
    • http://9l6v0m.bdgct.com/uploads/1/3/0/4/130477293/policy.html
    • https://fasigozup.files.wordpress.com/2020/06/xavojebadugego.pdf
    • https://sudevoxe.files.wordpress.com/2020/05/38901137873.pdf
    • https://wimilidovibi.files.wordpress.com/2020/06/katofipiwirowinejazupemez.pdf
    • https://zujanonazuk.files.wordpress.com/2020/05/xazodapaku.pdf
    • 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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d26.bin
96f5f28d2833b03ad1a527e5f54618aba86ae2a5d66aa8f103481548bf5e3f63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D26 10696 bytes

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