Malicious PDF — malware analysis report

Static analysis result for SHA-256 a52c934c5f151e29…

MALICIOUS

PDF

48.8 KB Authoring application: GIMP
MD5: 9b804132d3bfdef875d6b45e44d82440 SHA-1: 6cb68a77c94d57472ad03cf3c7d7eecd1b35a56a SHA-256: a52c934c5f151e2996a8332a4d937aa00fb994d6ac82098b4d10384ae8914d4b
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO manipulation or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. No scripts were extracted, and the document body is heavily obfuscated, preventing a more detailed analysis of the specific lure.

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://solucionesksm.com/uploads/1/3/0/5/130540559/davusexi_sepusateliri_gejavebukirox.pdf
    • http://samuelyusuf.com/uploads/1/3/0/6/130603753/2433063.pdf
    • http://jamesradack.net/uploads/1/3/0/6/130620716/katumuxigo.pdf
    • http://kagway.com/uploads/1/3/0/3/130379158/rogezazopaz_rikuwotidonogi_jaluxagoganu.pdf
    • http://quicktan423.com/uploads/1/3/0/7/130739385/folemefipotegurij.pdf
    • http://mymassagedude.com/uploads/1/3/0/5/130590122/javezub.pdf
    • http://jenniferhelenek.com/uploads/1/3/0/9/130969965/a6757eb32a.pdf
    • http://charlestongospelchoir.com/uploads/1/3/0/7/130739141/7ef376c1acb.pdf
    • http://barquinsleaders.com/uploads/1/3/0/5/130539442/8913160.pdf
    • http://150daily.com/uploads/1/3/0/5/130589033/nofuxutu_sujigimepavapu_resiviju.pdf
    • http://wxstuff.com/uploads/1/3/0/4/130476751/lemal.pdf
    • http://www.springcreekranchclublambs.com/uploads/1/3/0/7/130776719/pirir.pdf
    • http://endeavorsystems.com/uploads/1/3/0/4/130477882/rolada_domabujumamax_wuboz.pdf
    • http://bakersbible.online/uploads/1/3/0/4/130476564/zisazesirez_gofomowote_wigutejujoxa.pdf
    • http://dlgicefactory.com/uploads/1/3/0/4/130490019/0346f9249f27d90.pdf
    • http://tuijian.bpmtc.com/uploads/1/3/0/4/130476130/130476130.html#ajcc+8th+edition+free+download

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a4a.bin
b073be8c4178f671ac4e91d635b04e89be9cec15ec856be6923b41b0b2ee7387		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A4A 16152 bytes
font_01_sfnt_off00006259.bin
84fbb4816a40fb565ae5ace8b1017ccc9b087fe98e3eed02711a84bdd75a8e1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6259 8816 bytes

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