Malicious PDF — malware analysis report

Static analysis result for SHA-256 76875582bf35db1d…

MALICIOUS

PDF

41.0 KB Created: 2020-04-01 13:08:24 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 649cba845ebee9b1d245adf55f9c2922 SHA-1: 2787672cc149af78174af30e5ad60b2454a90edc SHA-256: 76875582bf35db1dc334348973af362b60356a8c6aec2e309797da96a784ee40
102 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of external links, many pointing to other PDF files, suggesting a link farm or redirection mechanism. The presence of 'scanf cmd windows' in a URL and the 'SE_LOLBIN_RUN_COMMAND' heuristic indicate an attempt to execute commands on the user's system. The document body, though heavily obfuscated, contains fragments that appear to be command-line instructions and URLs, reinforcing the malicious intent. The primary IOC is the URL containing 'scanf cmd windows', which likely serves as the initial entry point for further malicious activity.

Heuristics 4

  • 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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://heidihackford.net/uploads/1/3/1/4/131454656/131454656.html#scanf+cmd+windows
    • http://chelseabulldogs.org/uploads/1/3/0/5/130545278/viwapenoke.pdf
    • http://politicsrunamok.com/uploads/1/3/0/6/130604620/zotipozutimoli.pdf
    • http://karlageraci.net/uploads/1/3/0/5/130551696/pavujujonot.pdf
    • http://shinyshoping.com/uploads/1/3/0/2/130288533/7467566.pdf
    • http://entertainmentcorporate.com/uploads/1/3/0/3/130313081/6694613.pdf
    • http://nps-music.com/uploads/1/3/1/3/131378919/xegubadatag_fexiv.pdf
    • http://unmundodesabor.org/uploads/1/3/0/8/130874318/c47d585.pdf
    • http://rachelkaterose.com/uploads/1/3/0/2/130271116/luwevobulagoj.pdf
    • http://friendsforamenbrown.com/uploads/1/3/0/2/130272905/kalodixives-dirifusugokujuk-benuwelebodoze.pdf
    • http://schwabelfab.net/uploads/1/3/0/8/130813992/5306804.pdf
    • http://umkangen.com/uploads/1/3/0/2/130291658/2765048.pdf
    • http://frontlinefordogs.net/uploads/1/3/0/6/130605275/vosusomog.pdf
    • http://namayretreats.com/uploads/1/3/0/2/130288379/juzegasix.pdf
    • http://zaironstudio.com/uploads/1/3/0/4/130483232/xupifova-sixugij.pdf
    • http://4wheelsand1home.org/uploads/1/3/0/5/130551935/xarudowir-rexakigokagani.pdf
    • http://mcsacomplianceconsultants.com/uploads/1/3/0/4/130483911/rexijimogu-karejogitoxar-sixuv-bexosut.pdf
    • http://mstumekia.org/uploads/1/3/0/6/130639827/lowuxeg.pdf
    • http://arabellaboutiqueofnmb.com/uploads/1/3/0/2/130272582/lunikuxafagad_susajiza_bewefezetejil_juxokoz.pdf
    • http://lonestarwildernessmedicaltraining.com/uploads/1/3/1/1/131163512/877051.pdf
    • http://fourcornersboardofrealtors.com/uploads/1/3/0/8/130874492/d6a149faab.pdf
    • http://stanthonyrummage.org/uploads/1/3/1/0/131070530/bojurikawusix_rupesotarepofo_gopaja_morudafijakijez.pdf
    • http://kfreund.com/uploads/1/3/0/6/130639675/kovijodep.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074fd.bin
2e2454c229290a090f1a8be79c047c5f7ba7c47a1a5fae54d311c654a01bdf66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74FD 8756 bytes

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