Malicious PDF — malware analysis report

Static analysis result for SHA-256 feb3fb38428c05ab…

MALICIOUS

PDF

36.3 KB Authoring application: GIMP
MD5: 30e722ea4b65e7bc7888b499acee5250 SHA-1: ad7b85c89ccbc4ea262b22b836be8705e8dd5959 SHA-256: feb3fb38428c05ab4fe86b39b7cecac8bc2ff57ee6f53be30f3eabcca31c6a16
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO manipulation or to distribute malicious content. ClamAV identified this as Pdf.Phishing.TtraffRobotInstall, and a critical heuristic detected a mass external PDF link farm. The ML classifier also strongly indicated maliciousness.

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://www.emmettemplecreativeportfolio.com/uploads/1/3/0/4/130490421/83867f9.pdf
    • http://sptbgautorepairpros.com/uploads/1/3/0/7/130775747/gojowe_luwozumubokore.pdf
    • http://pesoclinic.com/uploads/1/3/0/5/130551087/vowamakop.pdf
    • http://thedesigndevil.com/uploads/1/3/0/7/130775719/8ab3ee1.pdf
    • http://laughingduck.org/uploads/1/3/0/2/130289236/5239830.pdf
    • http://entrepreneurialinnovations.com/uploads/1/3/0/5/130551559/dizipibuwasokum.pdf
    • http://harrywhophotoblog.com/uploads/1/3/0/2/130289242/02e0d6.pdf
    • http://msjacksonsclass.com/uploads/1/3/0/2/130287878/gokorumuw.pdf
    • http://communitychi.com/uploads/1/3/0/7/130775766/10ba0c6f39.pdf
    • http://quikartist.com/uploads/1/3/0/4/130476778/ziwuvones.pdf
    • http://ggingi.com/uploads/1/3/0/8/130814754/guwoludep.pdf
    • http://calligraphyyogacronulla.com/uploads/1/3/0/5/130544826/99ff1249.pdf
    • http://live4todayusa.org/uploads/1/3/0/6/130604626/130604626.html#achicar+pdf+sin+perder+calidad+online

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032bd.bin
3890fc9b29bf87e2d9852c3a3b1e8c42da361f73e66e7b14aecfda961bac3067		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32BD 9732 bytes

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