Malicious PDF — malware analysis report

Static analysis result for SHA-256 64b9ead544cc64ec…

MALICIOUS

PDF

31.4 KB Created: 2020-05-21 13:52:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 964c40971f0e10d055f467cfc8356f1e SHA-1: 775220f6da821e1f4d7d6cabd3d4b692fc21ea8d SHA-256: 64b9ead544cc64ec3dd6fc8c111ccce283209cf120a3a0b0c841573e01926013
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The document body contains obfuscated text and numerous URLs, suggesting an attempt to manipulate search engine results or redirect users to potentially malicious content hosted on external domains.

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://msgarletts-hancock.com/uploads/1/3/1/4/131437361/131437361.html#zac+efron-+scream
    • http://allianceconcept.net/uploads/1/3/0/8/130874139/gixedulilik.pdf
    • http://sebastian-copeland.fr/uploads/1/3/0/7/130740547/bagami.pdf
    • http://loud-cannabis.com/uploads/1/3/0/8/130874565/f227bf0b5b72651.pdf
    • http://primpedproperties.com/uploads/1/3/0/5/130544063/3657763.pdf
    • http://tanjalatimer.com/uploads/1/3/0/5/130551164/5647779.pdf
    • http://launchadvocates.com/uploads/1/3/1/6/131637830/86eb2f41c6.pdf
    • http://cn-abroaderedu.com/uploads/1/3/1/4/131483603/lipajufuju.pdf
    • http://limitlesscustomz.com/uploads/1/3/0/5/130538987/669044.pdf
    • http://cherierneal.com/uploads/1/3/0/2/130270971/kokasozoju.pdf
    • http://drivony.com/uploads/1/3/1/4/131452800/244113.pdf
    • http://belbambinowithlove.com/uploads/1/3/1/0/131071298/0f4b10c46d657d.pdf
    • http://wupbl.com/uploads/1/3/0/6/130622063/e7b7028f2252c2.pdf
    • http://ingecos.com/uploads/1/3/0/5/130539231/guxelaveligot.pdf
    • http://kensleigh.com/uploads/1/3/0/9/130969254/tuxorelobuxopo.pdf
    • http://joshbuyshouses.net/uploads/1/3/0/8/130874043/busonatibuzujiv-kekagedozelasa-bosafosebe.pdf
    • http://abalonofcalifornia.com/uploads/1/3/0/7/130740180/ea0c390c3aa0c66.pdf
    • http://jerashtrucking.com/uploads/1/3/1/6/131636965/gizuvekepeki.pdf
    • 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://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051d2.bin
e51a92da6b87f2807ad2deb398583edcc9aa5b2d19cd0634918ba4ac88a7fb21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51D2 9548 bytes

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