Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffcf2020157fb981…

MALICIOUS

PDF

49.2 KB Created: 2020-03-09 01:46:30 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c1e5709c8303071f55500ebc7b546c49 SHA-1: 89b8b6fcff11398dd83de7c6bf4a675d5ed96f1b SHA-256: ffcf2020157fb981f95c4eead6e47c34b4ef9ca5c8969492c98e7b4a23111ea7
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files. This behavior is indicative of a link farm designed to manipulate search engine results or distribute malicious content. The ML classifier strongly supports the malicious verdict. No scripts were extracted, limiting the analysis of direct payload execution.

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://yogaandasianbodytherapy.com/uploads/1/3/0/5/130544447/130544447.html#tahajjud+ki+namaz+ki+kitni+rakat+hoti+hai
    • http://hostmaster.leaksearchers.com/uploads/1/3/0/6/130639741/boremo.pdf
    • http://mrk.live/uploads/1/3/0/5/130540240/f9e20307.pdf
    • http://ridezy.com/uploads/1/3/0/2/130291561/3960279.pdf
    • http://yogaandtherapy.com/uploads/1/3/0/5/130539599/kupizarezifi.pdf
    • http://chapelhill.plus/uploads/1/3/0/2/130289211/a26b3896c7.pdf
    • http://itsbeenalledged.com/uploads/1/3/0/8/130874021/4855b807.pdf
    • http://www.maozedonrepresentativeofalltheasians.com/uploads/1/3/0/3/130323186/rumakisamilizon.pdf
    • http://www.msjacques-purdysclassroom.com/uploads/1/3/0/6/130639395/jepaloxijapalu.pdf
    • http://yash24supportedliving.com/uploads/1/3/0/6/130622063/wavik.pdf
    • http://sinfulrobot.com/uploads/1/3/0/5/130551630/nemunapo_negaki_dulegiwizeluv_xajufugalo.pdf
    • http://www.bedista.net/uploads/1/3/0/4/130476691/wafujawus.pdf
    • http://harvestleaders.org/uploads/1/3/0/2/130288492/wovilujutipisiz.pdf
    • http://scottdawson.info/uploads/1/3/0/7/130740455/3303790.pdf
    • http://bodytransformationhabits.com/uploads/1/3/0/6/130621063/5511581.pdf
    • http://fishbowllabs.com/uploads/1/3/0/5/130588607/rajowopube.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
stream_006_off00008f2a.bin
324616957f890d867f7f1f60923212fe716efbd5a63e9742f2afc82ba3f31a6f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8F2A 21980 bytes
font_00_sfnt_off0000704f.bin
64e86fa248f4a8c32a570590aa76b163c501346d17255ad73143ea0e37997310		 pdf-font-stream PDF embedded font (sfnt) at offset 0x704F 7968 bytes

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