Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcd1885ff37be9c0…

MALICIOUS

PDF

33.6 KB Authoring application: Mobipocket Creator
MD5: 20c0a64135c5baf08483521420179962 SHA-1: 79a4cb2f8e177aa5882fadb9cc03365433dd41ae SHA-256: fcd1885ff37be9c0add7afefbd5656591c3d44117281fce29a2b788320ab21c6
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ClamAV detection and ML classifier strongly support its malicious nature. 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://marcelliswentz.com/uploads/1/3/0/3/130313183/xawokozo.pdf
    • http://royaldaiimond.com/uploads/1/3/0/3/130379503/kututaxepo.pdf
    • http://rayraybeats.com/uploads/1/3/0/5/130539908/mujigivulinudo-jugiketim.pdf
    • http://summervilledental.com/uploads/1/3/0/8/130874113/letutiteraj.pdf
    • http://www.charliedgray.com/uploads/1/3/0/4/130483973/dibugopugowo-navozofutut-tevola.pdf
    • http://www.transformrenewingmindstrm.com/uploads/1/3/0/7/130776895/0568f3.pdf
    • http://trustcld.com/uploads/1/3/0/5/130588550/gezagoporarununarezi.pdf
    • http://vayonnaise.com/uploads/1/3/0/4/130435650/bodadaxopeso.pdf
    • http://simplysoinc.com/uploads/1/3/0/7/130740522/3014358.pdf
    • http://axecable.com/uploads/1/3/0/7/130740151/7466301.pdf
    • http://missouriinstituteofhypnotherapy.com/uploads/1/3/0/7/130775014/9052078.pdf
    • http://www.nlewriting.com/uploads/1/3/0/6/130620561/faririjat.pdf
    • http://thebusinesstip.com/uploads/1/3/0/6/130639653/130639653.html#conversion+jpg+to+pdf+free+online

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ad2.bin
69f71c9c6db299a03e48d7e2e02a46114f4341e4711a421a08000518442868dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AD2 8152 bytes

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