Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc4fb173904e86be…

MALICIOUS

PDF

37.9 KB Authoring application: Mobipocket Creator
MD5: ac18a8fb571617d2a8c77a6447310032 SHA-1: e99a247c4ac3c7a4d6bdacd0530d3a8282bb6802 SHA-256: bc4fb173904e86bebdbcec0569b41c404e0ba4503792be64290d0899339f3e29
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 URLs pointing to external PDF files hosted on various domains. This behavior is indicative of a link farm or redirection scheme, likely intended to lead users to malicious content or phishing sites. The ClamAV detection and ML classifier strongly support a malicious classification.

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.
  • 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://leatherpooltablepockets.com/uploads/1/3/0/5/130589410/puvofituw.pdf
    • http://beautyenpointe.com/uploads/1/3/0/5/130551270/2656475.pdf
    • http://squidoode.co.uk/uploads/1/3/0/2/130289535/kazuzapasibej.pdf
    • http://stemimpactawards.com/uploads/1/3/0/6/130621052/9bf0531e198.pdf
    • http://truurelief.com/uploads/1/3/0/6/130605254/pudusetad.pdf
    • http://digitalnomadcareer.com/uploads/1/3/0/6/130621110/7be908.pdf
    • http://onlinelarry.net/uploads/1/3/0/8/130814731/mexovate.pdf
    • http://weareriot.org/uploads/1/3/0/5/130539329/041f7c3.pdf
    • http://wrinkleddogs.com/uploads/1/3/0/5/130551656/nijefogebol-muzateret-goroxizi.pdf
    • http://online-tafe.com/uploads/1/3/0/7/130776225/sibunotur_wuzuzegelesalad.pdf
    • http://meroveo-officedistribution.store/uploads/1/3/0/3/130379170/c2740390b09.pdf
    • http://developertony.com/uploads/1/3/0/3/130313619/d0d60564a.pdf
    • http://greenarcdigital.com/uploads/1/3/0/7/130738662/dekixaxe.pdf
    • http://pmgfiletransfer.com/uploads/1/3/0/4/130475921/6750447.pdf
    • http://iwannapc.com/uploads/1/3/0/7/130776316/b8051f.pdf
    • http://webdisk.multivergelijker.nl/uploads/1/3/0/9/130969449/vedinis.pdf
    • http://www.alamomidcentury.com/uploads/1/3/0/7/130740586/mugezuliweg-beparifuvolaz-vuxisuxelobo-vukibefivuk.pdf
    • http://one21i.com/uploads/1/3/0/6/130639630/taxoruvujub.pdf
    • http://amh2sl.salon225.com/uploads/1/3/0/8/130814758/130814758.html#perimeter+of+a+rectangle+formula+given+area

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003748.bin
770af23c14bf1cb78a4733508a41b760eb954145563f08a16f13eeab4186bf6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3748 7616 bytes

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