Malicious PDF — malware analysis report

Static analysis result for SHA-256 03d1c9efc6315dd5…

MALICIOUS

PDF

44.6 KB Created: 2020-04-04 07:54:01 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 06e48c16ec136df0ee2fa0b5e56b7685 SHA-1: 7ca6be45554c57ce1274542ebdd6ab15811b8a97 SHA-256: 03d1c9efc6315dd5c3e913c6fe77626e39d320a5ad1332f84405cc95493331c3
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, includes a URL that points to a potentially malicious HTML file. The ML classifier strongly indicated maliciousness, and the presence of numerous links suggests a campaign to drive traffic or distribute further payloads.

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://twistedsugarut.com/uploads/1/3/0/8/130874493/130874493.html#oraciones+cortas+con+pla+ple+pli+plo+plu+para+ni%C3%B1os
    • http://capitaosp.com/uploads/1/3/0/4/130436154/7480054.pdf
    • http://dorrplumbingandheating.com/uploads/1/3/1/4/131438629/7536ffb49368.pdf
    • http://opendoorsol.com/uploads/1/3/0/8/130813913/pugopevatudez-doniwo-lubine.pdf
    • http://hemnnhaw.com/uploads/1/3/0/2/130291040/1758c66f96d4.pdf
    • http://cdc-tmsolutions.co.uk/uploads/1/3/0/2/130270845/dewitimiguxikiteso.pdf
    • http://nationalchristmasgreetings.com/uploads/1/3/0/6/130621156/dawosozejonad-wewakosizijup-tozimi-zegalodiw.pdf
    • http://the-generation-of-change.com/uploads/1/3/0/4/130488994/bemulovamovenidamak.pdf
    • http://native-garden-plants.com/uploads/1/3/0/8/130813784/0d6a0f34760.pdf
    • http://themadsparrow.com/uploads/1/3/0/4/130488974/370935.pdf
    • http://tuxebase.com/uploads/1/3/0/6/130621307/taxanuvisikuruk-fugavujilagim-tixugub-sezajuni.pdf
    • http://iglesiasolojesusesdios.org/uploads/1/3/0/4/130483679/4950464.pdf
    • http://buildredstone.com/uploads/1/3/0/5/130590663/8033503.pdf
    • http://onlinecreator.net/uploads/1/3/0/6/130639133/8f5a9c93af8.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006da4.bin
4dd3fd5271ae4339318ba8e77d2653f52579c633c2471a6ffc1adf57b389a434		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA4 8928 bytes
font_01_sfnt_off00008ddb.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DDB 16036 bytes

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