Malicious PDF — malware analysis report

Static analysis result for SHA-256 d766cb25f9724426…

MALICIOUS

PDF

36.9 KB Authoring application: QPDF
MD5: 22d9e249df814e3662cb20e778ad0b75 SHA-1: 6bb9d0dd9c5c89ccdf678e6080f3003058145dd9 SHA-256: d766cb25f9724426a1a972003db1ccf098f991fda3266b8b045351704bcb5693
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. It contains a mass of external links to other PDF files, suggesting a tactic to manipulate search engine results or distribute further malicious content. The embedded URLs are the primary indicators of compromise.

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://www.collegeallready.org/uploads/1/3/0/7/130776462/litidaw-defawe-fesexeta-zizevirajax.pdf
    • http://prophecyoutlook.org/uploads/1/3/0/5/130550672/davutasikuf.pdf
    • http://sgpbiz.com/uploads/1/3/0/6/130640091/288595b.pdf
    • http://locksmithracine.com/uploads/1/3/0/3/130379638/pakuw.pdf
    • http://cooperandshackleton.com/uploads/1/3/0/5/130542852/2625858.pdf
    • http://poolpatioscreenrepairorlando.com/uploads/1/3/0/2/130288554/durifoloxa.pdf
    • http://abcmp.xyz/uploads/1/3/0/3/130323462/xuwew_tazinafat_waxekirotawaka.pdf
    • http://acceleratehomeservices.com/uploads/1/3/0/5/130544954/eb70e6862a.pdf
    • http://mlfickcourtlandkindergarten.com/uploads/1/3/0/5/130543198/zezasiwajikexebi.pdf
    • http://markfreymd.com/uploads/1/3/0/7/130775169/ripajuriledu.pdf
    • http://049pledge.com/uploads/1/3/0/3/130323488/5743487.pdf
    • http://www.stemedacademy.com/uploads/1/3/0/7/130776271/3017302.pdf
    • http://iphoneuserexperience.com/uploads/1/3/0/7/130775610/gunusixakisoxewu.pdf
    • http://taglouisville.com/uploads/1/3/0/4/130478609/zesor-sinutogetizadu-nemelefu-ligaxegidano.pdf
    • http://nobuhotelmarbella.devsite-1.com/uploads/1/3/0/6/130620213/130620213.html#3+phase+volts+and+amps+to+kw+calculator
    • http://nobuhotelmarbella.devsite-1.com/uploads/1/3/0/6/130620213/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002a45.bin
d907c570f1f8f2d62f38d7529dbf77de46ca3a1917ec53aca7a78bae59874b04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A45 2616 bytes
font_01_sfnt_off000035df.bin
eb21ad8f3edda7de302cf123c92b1eae2256af425a3471837d5f131a98897828		 pdf-font-stream PDF embedded font (sfnt) at offset 0x35DF 7852 bytes

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