Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cfd2064174a2fb2…

MALICIOUS

PDF

36.1 KB Created: 2020-04-12 13:06:48 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c1d3929a84ac0bce4dba15c72f2450f1 SHA-1: 9d5e60146450741eb67631d923f517755ed7eb8a SHA-256: 3cfd2064174a2fb2e4a110d8f43537c49f2ed6af2e8ea2daf65f94cc43a6e945
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files on similar domains. This behavior is indicative of a link farm or SEO spam campaign. The ML classifier also flagged this PDF as malicious with high confidence. The document body contains garbled text and a formula, likely as a lure to disguise the malicious intent. No scripts were extracted from this sample.

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.
  • 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://supremekleens.com/uploads/1/3/1/3/131384442/131384442.html#kg%2Fhr+to+m3%2Fhr+gas+formula
    • http://dallashowell.com/uploads/1/3/0/7/130775951/1370178.pdf
    • http://huffmanshomestead.com/uploads/1/3/1/0/131071159/juzopawufu_taduk_sazog.pdf
    • http://fbcsavmo.net/uploads/1/3/1/4/131409210/314e4be2.pdf
    • http://powerlaunching.com/uploads/1/3/1/4/131437362/7663986.pdf
    • http://smulecircus.com/uploads/1/3/0/5/130550871/28b81903fce75.pdf
    • http://blacktranswomxnincarcerated.com/uploads/1/3/0/6/130640071/af3e8f06a.pdf
    • http://ourstorybarn.com/uploads/1/3/0/2/130271038/vekupuneluvebabajux.pdf
    • http://pokemongotrader.com/uploads/1/3/0/5/130539344/3410000.pdf
    • http://hinojosafamilylaw.com/uploads/1/3/1/3/131398561/rozogamobu.pdf
    • http://diamondpeakcampers.com/uploads/1/3/0/5/130539875/b9c3afa.pdf
    • http://maizysstayandplay.com/uploads/1/3/1/3/131383839/sodolatariduse.pdf
    • http://kategraceboutique.com/uploads/1/3/1/4/131437956/9fc1f.pdf
    • http://mtmotorboatin.com/uploads/1/3/0/2/130288798/zirodorufedax_gotafu_gizukokulilara.pdf
    • http://mspiggybank.com/uploads/1/3/0/6/130639661/gorosowupes-punifu-mixuzonijobade-jexiwu.pdf
    • http://theolivescript.com/uploads/1/3/0/5/130540193/berafiwana.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_off00006683.bin
93ee3168b169fd0e884cf5294abb1da2316fd241cecd8baee73a2b083a04fa20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6683 7568 bytes

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