Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ebcb0665e7ce915…

MALICIOUS

PDF

34.5 KB Authoring application: Inkscape
MD5: b81af573c17e765b17865daa8238cf0f SHA-1: 58388eff7bf859ebb2a24146664d2fb155b73b70 SHA-256: 4ebcb0665e7ce9157d532fc2830bfd90f0bd0d0c7d7a5dd9f2bb48ab65c732dd
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Link T1204.001 User Execution: Malicious Link

The sample is a PDF containing a large number of external links to other PDFs hosted on compromised sites, characteristic of an SEO link farm used for phishing. The document body lures the user with a fake 'Perfect english grammar past perfect exercise 3' pretext, and the ClamAV detection 'Pdf.Phishing.TtraffRobotInstall' further supports the malicious intent to drive traffic to these destinations.

Heuristics 4

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://deafperutour.com/uploads/1/3/0/6/130603838/vitofowobusap-xudaleluvug-busugelixig-gipojolivovezub.pdf
    • http://mriservicesnj.com/uploads/1/3/0/6/130621135/wigukolumijume.pdf
    • http://www.eugenweiss.com/uploads/1/3/0/6/130604502/talesivimepux.pdf
    • http://thedroneinvasion.com/uploads/1/3/0/6/130621805/xevukedibuvaral.pdf
    • http://trainingcenterchurch.org/uploads/1/3/0/7/130775979/lugodepamagapunazuxi.pdf
    • http://danielgann.com/uploads/1/3/0/2/130288554/1a64a6a9594784.pdf
    • http://apricotcoaching.com/uploads/1/3/0/4/130436242/latojoloj_bejiwarer_zimimebi_winaxeve.pdf
    • http://cristinacapucci.net/uploads/1/3/0/7/130775127/147d4895adbd54.pdf
    • http://funandsun.org/uploads/1/3/0/2/130271094/9466735.pdf
    • http://mayfairprinting.com/uploads/1/3/0/4/130483507/vetek-ligimogus.pdf
    • http://highvaluewoman.club/uploads/1/3/0/6/130639678/4283296.pdf
    • http://jg2oo.salon225.com/uploads/1/3/0/7/130775565/130775565.html#perfect+english+grammar+past+perfect+exercise+3
    • http://mayfairprinting.com/uploads/1/3/0/4/130483507/vetek-ligimogus

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002412.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2412 2652 bytes
font_01_sfnt_off00002fd6.bin
8e4de2f607cc9592837075d8ee6ec8b2543753f8563966bae7e5402959ff9153		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD6 7652 bytes

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