Malicious PDF — malware analysis report

Static analysis result for SHA-256 e250f36cbc4ae6c3…

MALICIOUS

PDF

48.2 KB Created: 2020-03-26 03:03:02 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: cfc3b7f89485a6f49f529a0fac99e541 SHA-1: e940a19ac3f6ef39a1329f21d7d18b206a7e4bfd SHA-256: e250f36cbc4ae6c304689f4dc8c1285e57a4c319d9be436bffc3b89501f4818d
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a 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://helpking.org/uploads/1/3/1/1/131164278/131164278.html#mules+and+men+pdf
    • http://dannylife.co.uk/uploads/1/3/0/3/130312961/kezodofizukerat.pdf
    • http://thesustainables.biz/uploads/1/3/0/6/130621483/2901912.pdf
    • http://mauirealestateacademy.com/uploads/1/3/0/7/130775405/sobamelixibo.pdf
    • http://www.kelleyfrodel.com/uploads/1/3/0/9/130969754/6126011.pdf
    • http://tinysugarshop.com/uploads/1/3/0/4/130435978/618d14a6c.pdf
    • http://eaglehostel.com/uploads/1/3/0/5/130551245/5542535.pdf
    • http://bespokeleatherbrand.com/uploads/1/3/0/3/130323603/3644577.pdf
    • http://www.hollyspetportraits.com/uploads/1/3/0/4/130494478/pepolusesusewidum.pdf
    • http://aldinteriors.com/uploads/1/3/0/5/130588802/moguzor_murokabelekake_fobekeso.pdf
    • http://mariettebasson.com/uploads/1/3/0/4/130483469/5703890.pdf
    • http://www.munchie.store/uploads/1/3/0/5/130543761/69ec21.pdf
    • http://crownjulesofhair.com/uploads/1/3/0/9/130969814/poxovuxalaz.pdf
    • http://mi4d.com/uploads/1/3/0/4/130491001/texupaw-gewin-luvikobeviku.pdf
    • http://chloedaniellewhite.com/uploads/1/3/0/8/130814631/deluvipamojunujom.pdf
    • http://tenzafansite.com/uploads/1/3/1/0/131071295/a36f12f26.pdf
    • http://goodgraham.com/uploads/1/3/0/7/130776824/gopaxorepewe.pdf
    • http://mx.edgeservicesllc.com/uploads/1/3/0/3/130379096/f42914b.pdf
    • http://pundit-predictions.com/uploads/1/3/0/3/130379222/8263048.pdf
    • http://elura.co.uk/uploads/1/3/0/3/130323754/4810875.pdf
    • http://www.westraymusic.com/uploads/1/3/0/7/130776220/nisej.pdf
    • http://garsonfamilychiropractic.ca/uploads/1/3/0/6/130604952/sagorubamadu_vefixinaserofof.pdf
    • http://tiastidyteam.com/uploads/1/3/0/4/130435927/raxemam.pdf
    • http://newspringfieldbc.org/uploads/1/3/0/7/130738504/wejumef-duravumifo-xagefu.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000093e4.bin
60142acf2831842babc80d61e917809fd1cbf667f23d8f1bf891d75cf665c50b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93E4 8128 bytes

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