Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac5c6a055bb4011d…

MALICIOUS

PDF

56.9 KB Created: 2020-03-14 12:15:39 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: fff2c6463071cb290a3445c7c6981fea SHA-1: aa782b98e8f86f7f828103fe56e9f141222ba6c9 SHA-256: ac5c6a055bb4011d3f325e7ef0954b7790154fedd6bd27d663e4ec216f1f1944
70 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded external links, a technique often used for SEO poisoning or to direct users to malicious websites. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this behavior, indicating the document's primary purpose is to act as a lure. The presence of a 'download button' heuristic further supports the social engineering aspect of this attack. No scripts were extracted from this sample.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://74-123-78-90.mgwnet.com/uploads/1/3/0/5/130540146/130540146.html#arithmetic+progression+class+10+pdf
    • http://acappellakeith.com/uploads/1/3/0/2/130289736/8214668.pdf
    • http://moshetiptop.com/uploads/1/3/0/5/130550729/fesigopof_lemapubetux_tanalew.pdf
    • http://marylandvcoc.com/uploads/1/3/0/6/130604373/pebasewid.pdf
    • http://mrsbhatt.com/uploads/1/3/0/7/130738854/badopot.pdf
    • http://www.zioncustomworks.com/uploads/1/3/0/2/130272352/gomizikunutetobevu.pdf
    • http://manuelaferretti.ch/uploads/1/3/0/7/130775630/9a9cbc4.pdf
    • http://bu-life-coach.de/uploads/1/3/0/5/130590672/bd9fc279f082c.pdf
    • http://k12voip.com/uploads/1/3/0/6/130604140/zoladazorifej_tujube_simuw_jetogopitikawu.pdf
    • http://www.jeanmichelrabate.org/uploads/1/3/0/4/130476144/paterax_xevodajo_tiruvije_wikapigidudavo.pdf
    • http://thomassearseportfolio.com/uploads/1/3/0/6/130639905/takeje.pdf
    • http://healingwatersrvpark.com/uploads/1/3/0/3/130379426/lasinesexumimov_kawinuzaxu.pdf
    • http://takeoutstyle.com/uploads/1/3/0/2/130271099/lesixaviwezoxeduw.pdf
    • http://www.huntingdonsga.org/uploads/1/3/0/6/130639456/pugedukal.pdf
    • http://clichecourse.com/uploads/1/3/0/6/130621130/8632973.pdf
    • http://www.capehatterascoffee.com/uploads/1/3/0/5/130541445/tonipap-gunamogeturuse.pdf
    • http://www.ravenswoodleasing.com/uploads/1/3/0/6/130621083/jebezumidoxupufo.pdf
    • http://jimmyironstattoo.com/uploads/1/3/0/6/130604030/1492299.pdf
    • http://www.abeyart.com/uploads/1/3/1/1/131163512/3150463.pdf
    • http://diankaesthetikstudio.com/uploads/1/3/0/7/130775413/e685dd44bf.pdf
    • http://naddin.space/uploads/1/3/0/5/130542902/nemino.pdf
    • http://stellarnonprofits.com/uploads/1/3/0/5/130551057/kikojibomijiboxavevu.pdf
    • http://www.offcutgames.org/uploads/1/3/0/5/130539279/8055260.pdf
    • http://naadrywallllc.com/uploads/1/3/0/6/130620650/4743821.pdf
    • http://adogsworld.be/uploads/1/3/0/6/130639975/dolujudufokedagitit.pdf
    • http://americanhazelnut.co/uploads/1/3/0/8/130813539/5467057.pdf
    • http://adogsworld.be/uploa
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008015.bin
f42a3f9f472c7a08f29a2dac4d8e4b53c474c8b86ddc428c0644b562f1439e2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8015 8152 bytes
font_01_sfnt_off00009f88.bin
28cfba900f9747eec0bc945df4561dd96f89cc721210b4ee9d1cb381a7875d39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F88 16220 bytes
font_02_sfnt_off0000b4d8.bin
096e40a28de67ca4645dd23d846453df467d3af3ab58ec7dca062cd279989605		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4D8 10648 bytes

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