Malicious PDF — malware analysis report

Static analysis result for SHA-256 25f6efc670f1d61a…

MALICIOUS

PDF

94.8 KB Created: 2020-05-15 18:46:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2deb57eb1fb59c412354afc40d40a653 SHA-1: e300238f216a3d4eb11061474369e41ab87da285 SHA-256: 25f6efc670f1d61a36514136edf7b332e81a6be40400f00d22f06741f1f640ea
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The embedded URLs suggest a link farm or redirection scheme, likely intended to direct users to malicious content or for SEO manipulation. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://thebairdproject.org/uploads/1/3/0/6/130621163/130621163.html#n+f+r+ka+full+form
    • http://htownskydive.com/uploads/1/3/0/3/130324164/4103030.pdf
    • http://jonesborosp.com/uploads/1/3/1/4/131406356/tubiruxojevuposix.pdf
    • http://megasstore.net/uploads/1/3/0/7/130739251/f0a55ae07a8ed21.pdf
    • http://xquisitesalonstudios.net/uploads/1/3/0/8/130814430/nunitivonizen.pdf
    • http://catscupcakes.org/uploads/1/3/0/5/130545097/fobinurijuvir.pdf
    • http://captainschoices.com/uploads/1/3/1/3/131383770/zimexakoj_tufirojibaf.pdf
    • http://mydenson.com/uploads/1/3/1/3/131380942/2046176.pdf
    • http://jamieparrish.com/uploads/1/3/0/4/130483514/6279782.pdf
    • http://delangeadvies.nl/uploads/1/3/0/8/130873740/nojun.pdf
    • http://fastlanetofitness.com/uploads/1/3/1/3/131379434/vekufukuve-bezejo-monijuso.pdf
    • http://rspsolutionsservices.com/uploads/1/3/1/0/131070579/5941303.pdf
    • http://consumerscomefirst.org/uploads/1/3/0/2/130274241/ganilupuvixowuma.pdf
    • http://wsj17.com/uploads/1/3/1/6/131606227/bumefedew.pdf
    • http://thepowerofmentalillness.com/uploads/1/3/1/3/131384298/03373cc5a.pdf
    • http://myroyalorganics.com/uploads/1/3/0/3/130379824/2bdad20db268.pdf
    • http://donkahmedie.store/uploads/1/3/1/4/131438356/3141147.pdf
    • http://pamelacarr.com/uploads/1/3/0/6/130639581/6693296.pdf
    • http://lavenderandslate.com/uploads/1/3/0/5/130589088/mupineseme.pdf
    • http://trindigo.info/uploads/1/3/0/2/130273582/2b89204.pdf
    • http://beyondmaddy.com/uploads/1/3/0/6/130621351/funujewusu.pdf
    • http://ajameskolar.com/uploads/1/3/0/7/130739063/fidusatafizinamalev.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000133a4.bin
e35214279b10ca266c4d2aa9b0087c4dfe033f2f1045b748b2e9a858440a2e9d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x133A4 21576 bytes
font_00_sfnt_off0000f958.bin
15f7ee910a1c1d80f226ea4f78e8d80409598cc33e1090b63fa1c4bfd02dcee6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF958 10964 bytes
font_01_sfnt_off00011e15.bin
c89cd4610e7ad6cabf04f9876a36b22b5c31ae53dba02aeaa1b4677657537330		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E15 16248 bytes

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