Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d7b33d49758fea0…

MALICIOUS

PDF

39.5 KB Created: 2020-03-28 12:51:53 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a31900284cea2f01695948aa954f1cb8 SHA-1: 1133e91546dc30f9b2e54ab36a1ad687332915ef SHA-256: 4d7b33d49758fea0c472a95513fd261a122bd0dd7ede87d8378ca6c905955e14
92 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. These links point to various PDF files hosted on different domains, suggesting a link farm or SEO manipulation tactic. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted from this sample. The primary attack pattern involves redirecting users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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
  • 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://it-pi.nl/uploads/1/3/0/7/130775627/130775627.html#metaparadigm+of+nursing+explained
    • http://moneypennyandq.com/uploads/1/3/0/6/130639438/5020243.pdf
    • http://www.connectimacy.com/uploads/1/3/0/6/130604335/voxupipiw_vuxur_jarap_kazofifiteva.pdf
    • http://mx.beejoyfulsoap.com/uploads/1/3/0/5/130551599/seveven_sanejilunaj_saxagofedov_gusirajifapase.pdf
    • http://composers.directory/uploads/1/3/0/2/130288514/tetuxifulatujexoguna.pdf
    • http://homebrewershirts.com/uploads/1/3/1/1/131163832/b1bf7b.pdf
    • http://davidjmcgraw.info/uploads/1/3/0/7/130776006/49010f6498677b3.pdf
    • http://chitowngala.com/uploads/1/3/0/2/130288318/vagomomupi-daledosoguteguf-dujix.pdf
    • http://www.reliefathand.com/uploads/1/3/1/1/131163969/b30bf1126db.pdf
    • http://taracowellplain.com/uploads/1/3/0/6/130605040/zonoderejen_bogomotuv.pdf
    • http://la-mancha.org/uploads/1/3/0/5/130590036/2663fe5.pdf
    • http://www.pepivilana.com/uploads/1/3/0/5/130589077/lanonexavasunegaju.pdf
    • http://koio.com/uploads/1/3/0/6/130604730/xovonido.pdf
    • http://www.grabovac.hr/uploads/1/3/0/7/130739766/4239706.pdf
    • http://therealsolutionsllc.com/uploads/1/3/0/6/130604733/7907527.pdf
    • http://www.glitzyglass.shop/uploads/1/3/0/7/130776836/7cc6cd14e621792.pdf
    • http://chicagotoeflschool.com/uploads/1/3/0/7/130739567/9489958.pdf
    • http://chrisdelany.com/uploads/1/3/0/7/130739116/2313350.pdf
    • http://jamiechapinclassic.com/uploads/1/3/0/4/130483879/jefodovapika_xejenawebupo_lavafivobufejax.pdf
    • http://aziragroup.com/uploads/1/3/0/4/130435695/numigevojaxawifekusa.pdf
    • http://timpicardmusic.com/uploads/1/3/0/8/130814448/9621967.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_off0000734b.bin
afc7937d33a43f1aca4684ff559ce519d404bf58f4fd8ca7cabadc9775dd2e8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x734B 7444 bytes

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