Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d519fb4a7456b4e…

MALICIOUS

PDF

45.4 KB Authoring application: pstoedit
MD5: bcd2bc5aa05cd7442945b13e4c3e5e1b SHA-1: 81a7b43bfc8761e16f13363d75a322d6be4e6b9f SHA-256: 5d519fb4a7456b4e8db29806ef095b967317b28d762e9d9a7531606f898e7bb6
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links disguised as educational resources, a common tactic for SEO poisoning and phishing. The embedded content attempts to trick users by claiming they are using an outdated browser, encouraging them to click the malicious links. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

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://yukonschools.ca/uploads/1/3/0/6/130603861/1419378.pdf
    • http://njliupdate.com/uploads/1/3/0/6/130640218/kadosoberutapake.pdf
    • http://seaspaorganics.com/uploads/1/3/0/7/130738619/ecfb461aa40.pdf
    • http://stargazingangel.com/uploads/1/3/0/7/130740183/gopaka_sidowarebo_mowufefaj_tuvipe.pdf
    • http://e2advendure.com/uploads/1/3/0/5/130552073/ruwokirixazagek.pdf
    • http://shannoncallarman.com/uploads/1/3/0/5/130539800/5190722.pdf
    • http://bandyandshinty.com/uploads/1/3/0/4/130436441/4114947.pdf
    • http://nikaspaus.com/uploads/1/3/0/3/130323311/ralinuri_wazagizururase_tajugu.pdf
    • http://beingself-centered.com/uploads/1/3/0/5/130541924/130541924.html#biology+investigatory+projects+for+class+12+free+download+pdf
    • http://fontawesome.iohttp://fontawesome.io/license/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001251.bin
a4235eb5f652646b3776a25fb0a10136701bad3ace048850f3e71456d8ec51fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1251 9156 bytes
font_01_sfnt_off00007818.bin
7df88723569d4193f530fe437fb919d713328a77de93ba1b94bee14e62ba1f6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7818 1712 bytes

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