Malicious PDF — malware analysis report

Static analysis result for SHA-256 b22c47c6d8c423c5…

MALICIOUS

PDF

33.0 KB Authoring application: LibreOffice
MD5: a99a0a80935810fd71e019aafd43323a SHA-1: 0c2ffb25012326183840b4538efd5ef4987486b8 SHA-256: b22c47c6d8c423c5ac09697d47bd87ed0a7d14f1412b18e2b6c84bfecb28305d
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF documents hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content, as flagged by the PDF_SEO_LINK_FARM heuristic and ClamAV detection. The ML classifier also strongly indicated maliciousness. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://translatemyblog.org/uploads/1/3/0/8/130814421/3278993.pdf
    • http://r3healthandfitness.com/uploads/1/3/0/2/130273987/2185578.pdf
    • http://norawahlbrink.com/uploads/1/3/0/4/130476818/8895850.pdf
    • http://plan2succeed.net/uploads/1/3/0/8/130814871/a6b70081b8.pdf
    • http://crazzynuts.com/uploads/1/3/0/3/130323475/kubajobafa.pdf
    • http://updanceacademy.com/uploads/1/3/0/6/130621619/1468398.pdf
    • http://bavarian-opera-academy.com/uploads/1/3/0/4/130483649/fajuzotikazisuliga.pdf
    • http://cbdcreamonline.com/uploads/1/3/0/8/130814460/3471e.pdf
    • http://motortainment.com.au/uploads/1/3/0/5/130590656/jexubuzevogeseb_tinenaretuf_malabalazewuzuj_mixifazumadubo.pdf
    • http://mx.jolien.net/uploads/1/3/0/5/130539048/polavorupujolavep.pdf
    • http://zhiraf.site/uploads/1/3/0/7/130775724/depudug.pdf
    • http://mshvita.com/uploads/1/3/0/6/130621498/ce340e3.pdf
    • http://nikkinormanphotography.com/uploads/1/3/0/2/130287493/3fddded.pdf
    • http://alexiszotos.com/uploads/1/3/0/5/130590126/f2ad88b0.pdf
    • http://shoptheclubhouse.com/uploads/1/3/0/6/130604423/butosex_wufegufolema.pdf
    • http://sluglyne.com/uploads/1/3/0/6/130621648/9f639d4c3.pdf
    • http://u21.life/uploads/1/3/0/7/130776493/warokaka.pdf
    • http://cookislandparadise.com/uploads/1/3/0/6/130605041/karaxugobowi.pdf
    • http://host201.carmichaelnl.com/uploads/1/3/0/6/130621457/130621457.html#ayyappan+songs+free+download+tamil+by+veeramani+masstamilan

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001900.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1900 2652 bytes
font_01_sfnt_off0000248d.bin
4723caa335c429611670035b64a15e5cd81249f0ddd53d2de5c6273044a0feec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x248D 7216 bytes

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