Malicious PDF — malware analysis report

Static analysis result for SHA-256 0660bd7860ec45be…

MALICIOUS

PDF

34.9 KB Created: 2020-06-04 01:53:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c30541bbd94eb753c603ae29bfe5972 SHA-1: b5eeef4b63c2bc0bb583be4ce9e71cbf1784f5cc SHA-256: 0660bd7860ec45beb87dab523123d62f5a1b05a84f718280d276a1e2fc6e39f5
96 Risk Score

Malware Insights

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

The PDF document contains numerous external links, a common tactic for SEO spam or redirecting users to malicious sites. The 'PDF_SEO_LINK_FARM' heuristic specifically flags this behavior. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence suggest malicious intent, likely to lead users to phishing or malware download pages.

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://gilles.gent/uploads/1/3/0/8/130873769/130873769.html#como+se+usa+el+titan+gel
    • http://truenorthlegal.com/uploads/1/3/1/3/131384249/cc7a0418.pdf
    • http://mrandmrsdrycleaners.com/uploads/1/3/0/2/130288498/tuwur.pdf
    • http://georgianfatrust.org/uploads/1/3/0/7/130739401/zelanoxibepaku-lesuxip-salumisirariv.pdf
    • http://teaofbox.com/uploads/1/3/2/3/132302847/8401286.pdf
    • http://partabcdeasyas123.com/uploads/1/3/0/6/130604088/fuvagidomimasowokoj.pdf
    • http://stylingtipsandideas.com/uploads/1/3/0/5/130551639/3f05dba242.pdf
    • http://gilles.gent/uploads/1/3/0/8/130873769/terms.html
    • http://gilles.gent/uploads/1/3/0/8/130873769/dmca.html
    • http://gilles.gent/uploads/1/3/0/8/130873769/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://limobamosid.files.wordpress.com/2020/06/zazupukokig.pdf
    • https://govaxozom.files.wordpress.com/2020/06/zevefa.pdf
    • https://rilusepo.files.wordpress.com/2020/06/45522340743.pdf
    • https://mixanutiliba590569985.files.wordpress.com/2020/06/32467959558.pdf
    • https://gebotapigi358268599.files.wordpress.com/2020/06/2803290487.pdf
    • https://tiwipur.files.wordpress.com/2020/06/1839568008.pdf
    • https://xudoraseme.files.wordpress.com/2020/06/1018484912.pdf
    • https://nufiluva.files.wordpress.com/2020/06/dusawixujisuderulutinar.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e17.bin
adc075e6f9625314c3c4d930146379a0bea1ac86e971341e9df4190867ebb4ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E17 10432 bytes

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