Malicious PDF — malware analysis report

Static analysis result for SHA-256 33439e3e67fd308e…

MALICIOUS

PDF

38.6 KB Created: 2020-04-03 04:39:34 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 6da2d0633f8554ee88d3d593abed4827 SHA-1: a6414ac7db5f5b20fd3c68b030d95781c237c8b0 SHA-256: 33439e3e67fd308edc2695195b8645ce073422173e7bfb6085bef9bafa18ea71
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many pointing to other PDF files, suggesting a link farm or SEO poisoning tactic. The document body mentions 'create a shell script in linux' and includes embedded URLs, indicating an attempt to redirect the user to potentially malicious content. The heuristic 'SE_LOLBIN_RUN_COMMAND' suggests that the document may also contain instructions for executing commands on the user's system, possibly via PowerShell or similar tools, to download and execute further payloads.

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://reviewreflectroam.com/uploads/1/3/0/7/130739060/130739060.html#create+a+shell+script+in+linux
    • http://anantio.com/uploads/1/3/1/4/131406676/1a19bfdbd8cdf.pdf
    • http://westcreekfinancial.com/uploads/1/3/0/5/130588296/a62b3012a1043f.pdf
    • http://msvieirasclassroom.com/uploads/1/3/0/2/130272977/3dd0f2a8abe.pdf
    • http://mamajourneys.com/uploads/1/3/0/5/130540077/0c6d392bb36a4f.pdf
    • http://phelpseng.com/uploads/1/3/0/9/130968920/fimikematapufor_pinimogarexo_badomupet_kilovasojidin.pdf
    • http://girishmithran.com/uploads/1/3/0/6/130604269/5016597.pdf
    • http://sfdiversifiedservicesllc.com/uploads/1/3/1/4/131406432/410957dfd.pdf
    • http://falconsignals.com/uploads/1/3/0/4/130483895/rujibi-livuke.pdf
    • http://barrel-lock-key.com/uploads/1/3/0/9/130969011/wuvekawowi_potumakik.pdf
    • http://inversefootwear.com/uploads/1/3/0/5/130589171/seladiv.pdf
    • http://pavon.dk/uploads/1/3/0/6/130621854/zumezite.pdf
    • http://nightmaremuscle.shop/uploads/1/3/0/6/130605435/fenobi_pagewunel_kogikibiduj_wolepumeba.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_off00006c0d.bin
eb7761ba955428a9f289a7bd0b92b6ff4485ec82d60fc4db735703d2a1b925ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0D 8768 bytes

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