Malicious PDF — malware analysis report

Static analysis result for SHA-256 70aa046f3fe594e5…

MALICIOUS

PDF

40.6 KB Created: 2020-04-21 08:26:23 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 661a6a581c15141a307e561774ed0e6d SHA-1: 4207d2a13ffd63372344de478c599b3a14081eb7 SHA-256: 70aa046f3fe594e567424d11127325cad0e8bd7fa2631a3b164eb8485c5d6124
96 Risk Score

Malware Insights

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

The PDF document contains numerous external links, masquerading as sheet music, which is a common lure for phishing or malware distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of generated links, suggesting a link farm used for SEO poisoning or to distribute malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://palmettoautoblanket.com/uploads/1/3/1/4/131452858/131452858.html#fur+elise+full+sheet+music+piano
    • http://neilhitchcock.net/uploads/1/3/0/4/130488199/januzugujojifapoj.pdf
    • http://rlgconstruction.net/uploads/1/3/0/7/130775766/tefukidos-jidosisero.pdf
    • http://kurumibijin.com/uploads/1/3/0/3/130312951/bunevamus.pdf
    • http://sonomacountytherapist.com/uploads/1/3/0/9/130969623/382bbd7.pdf
    • http://growersgrandaughter.com/uploads/1/3/0/3/130323997/lalivewevof.pdf
    • http://shortstayhouston.com/uploads/1/3/0/7/130739867/zeluviru.pdf
    • http://swiftlyrecruitingstaffing.net/uploads/1/3/0/9/130969262/586534.pdf
    • http://heatherdfulton.com/uploads/1/3/0/5/130543536/de668a23a6b9e.pdf
    • http://aksecommercialservicesllc.com/uploads/1/3/1/4/131438216/7d9c2a440.pdf
    • http://emeclthg.com/uploads/1/3/0/5/130540286/d930360a.pdf
    • https://musescore
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://musescore.youtube.com/song/fur_elise_woo_59-12850
    • https://musescore.com/artist/beethoven_ludwig_van-1977
    • 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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a16.bin
ffafb757f94544064462de5fdd92af518bc6f84441fe4aba7644986a7f15bd71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A16 9276 bytes
font_01_sfnt_off00008cdb.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CDB 2652 bytes

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