Malicious PDF — malware analysis report

Static analysis result for SHA-256 5be8621734115c75…

MALICIOUS

PDF

42.4 KB Authoring application: GIMP
MD5: 02f3acb710b6853f15e26ec8150ae00c SHA-1: 708a605f7c958a524cd72cf10507b4997f2a9414 SHA-256: 5be8621734115c756e054344ae594350dc731b6e8996c85d1dafd46e61143e10
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO manipulation or to distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or malicious PDF. No scripts were extracted, but the sheer volume of external links suggests a coordinated effort to redirect users.

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://propertysitters.ca/uploads/1/3/0/2/130291596/kerudazemigag-mapojuva.pdf
    • http://drandrewlukaris.com/uploads/1/3/0/6/130639458/fc2a927b.pdf
    • http://wvbetter.com/uploads/1/3/0/4/130478347/tewamure.pdf
    • http://ecceko.net/uploads/1/3/0/7/130738531/nepus.pdf
    • http://jkruegerimages.com/uploads/1/3/0/6/130604391/4a0834c283.pdf
    • http://1.zootown.com/uploads/1/3/0/8/130813953/jufabogokar_devijigisuzami_dopixapesit_dupozepixor.pdf
    • http://affinityforever.com/uploads/1/3/0/5/130540928/rofomobowimivoj.pdf
    • http://nantigo.com/uploads/1/3/0/8/130813526/2927856.pdf
    • http://monthlytoothtalk.net/uploads/1/3/0/3/130313098/650655.pdf
    • http://ninjaproxies.org/uploads/1/3/0/4/130476564/vabaf_kolus.pdf
    • http://movementuniversity.com/uploads/1/3/0/2/130271153/3032335.pdf
    • http://photosbypri.com/uploads/1/3/0/6/130640141/fupomajo_zoxedinitabozal_sofabalevor_wujub.pdf
    • http://positivelygroovy.net/uploads/1/3/0/7/130775983/e794cf1b274.pdf
    • http://uteo.us/uploads/1/3/0/5/130545189/ce2d82e3.pdf
    • http://mcbleoa.info/uploads/1/3/0/7/130740258/3d61fe393b8c3e.pdf
    • http://jordanstewarthealth.net/uploads/1/3/0/6/130621980/2493682.pdf
    • http://theovercomersblueprint.com/uploads/1/3/0/4/130475992/130475992.html#air+force+x+y+group+syllabus+in+hindi+pdf
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000342f.bin
6640bccddbdd4aac1d442e0a8c2fdc2a1b86f5535c90bde0a50354a72a73478c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x342F 7212 bytes
font_01_sfnt_off0000493f.bin
30bdc4b83b72898308f7ac7e34644af3bc7ea7d561f97cf4cbbb37ccba85ad82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x493F 8104 bytes

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