Malicious PDF — malware analysis report

Static analysis result for SHA-256 9347578033861ee1…

MALICIOUS

PDF

44.8 KB Created: 2020-03-30 05:56:23 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e3119aeae530b60448c938bd43293061 SHA-1: 2353a0ac5e4d43374b9df23cd6d0e799b4e89a31 SHA-256: 9347578033861ee1c1eb79e2c591105cdd04f3ab213ad5bf9c6b024a1e069772
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains references to these URLs, suggesting a deliberate attempt to direct users to a network of potentially malicious websites. The ML_NYX_PDF_MALICIOUS heuristic strongly indicates 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://jeffersonc123.org/uploads/1/3/0/9/130969403/130969403.html#estructura+quimica+de+acido+palmitico
    • http://spinnerdavefishreport.com/uploads/1/3/0/6/130620973/5451e6e19e4.pdf
    • http://universalrideservicellc.org/uploads/1/3/1/0/131070843/8376e4048309c.pdf
    • http://orlandoaccidentlawyer.net/uploads/1/3/0/8/130874382/7044306.pdf
    • http://ptchvac.com/uploads/1/3/0/6/130604982/nazem.pdf
    • http://beelerinsgroup.com/uploads/1/3/0/5/130551486/9027052.pdf
    • http://jeanettefashions.com/uploads/1/3/0/7/130776436/giliku.pdf
    • http://lightenupenergy.com/uploads/1/3/0/2/130288506/2228900.pdf
    • http://mymentalhealthmatters.net/uploads/1/3/0/6/130621158/vekebefupu_setili.pdf
    • http://findfastandbuy.com/uploads/1/3/0/6/130604956/8139852.pdf
    • http://esthetiqueautogo20.com/uploads/1/3/0/5/130551135/55265b5b.pdf
    • http://worldpetpod.com/uploads/1/3/0/9/130969559/664067114e3fdc.pdf
    • http://mormonads.org/uploads/1/3/0/7/130739505/6043cc68a66693e.pdf
    • http://michael-downing.com/uploads/1/3/0/8/130814345/nunan.pdf
    • http://clarioncountygop.com/uploads/1/3/0/4/130483341/lenizukexixisugasobo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e17.bin
17e620d6468ec9e8ba6efca4db77e783fd2bed494ce88fa98168ef64a8632f49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E17 9220 bytes
font_01_sfnt_off00008f0f.bin
fc0bcc9d08d908b8b1287d0ab2df4e3a5be78b1d1690d8efe3ff9d2c54ab5679		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F0F 16064 bytes

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