Malicious PDF — malware analysis report

Static analysis result for SHA-256 afc9761b8e5ec1c4…

MALICIOUS

PDF

35.9 KB Authoring application: GIMP
MD5: ba67ec32866a7316b7e0e54da766db31 SHA-1: b7312643febaa81b1452fc0977204d9a4ccbd0a0 SHA-256: afc9761b8e5ec1c4e3a5c6cd7f9e8ea27240d854df67c07e9bd3e07659f452c6
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF documents, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection of Pdf.Phishing.TtraffRobotInstall-7605656-0 further supports a malicious classification. The embedded URLs are likely used to distribute phishing content or for SEO manipulation. No scripts were extracted from this sample.

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://bannerfm.com/uploads/1/3/0/8/130874136/475329.pdf
    • http://fmdlgyf.sites.logojoy.com/uploads/1/3/0/5/130540554/be5578646b.pdf
    • http://www.cebulechonandgrillhouse.com/uploads/1/3/0/9/130968994/ziwefofuk_kujunavuwem_xekotidozuf.pdf
    • http://mtbgus.com/uploads/1/3/0/6/130639916/cca606ac.pdf
    • http://neuvenicephoto.com/uploads/1/3/0/7/130740598/pagamavexitasete.pdf
    • http://priscilajamison.com/uploads/1/3/0/6/130620317/1179520.pdf
    • http://seydarebai.com/uploads/1/3/0/2/130289224/1751632.pdf
    • http://challengingshakespeare.com/uploads/1/3/0/6/130604955/safawubigupilit.pdf
    • http://www.dmsinternational.co.uk/uploads/1/3/0/4/130476359/nagokamonez.pdf
    • http://equity.rocks/uploads/1/3/0/2/130287505/surekirebodar.pdf
    • http://myescondidosoccer.com/uploads/1/3/0/6/130620209/jimawolim_kibuwunamakemel.pdf
    • http://schmittsanimalhospital.net/uploads/1/3/0/5/130588703/wajuluxezejulor.pdf
    • http://velvetarmenia.net/uploads/1/3/0/7/130776561/68cbb99.pdf
    • http://northwestuu.com/uploads/1/3/0/8/130814902/130814902.html#how+is+the+chemical+reaction+of+acetic+acid+with+sodium+bicarbonate+represented

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000028a6.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28A6 2652 bytes
font_01_sfnt_off00003449.bin
cc36c5ab6a70cb818ef9ba5cb9a4813f28fca590668def23eacd93b448eeeb0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3449 7328 bytes

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