Malicious PDF — malware analysis report

Static analysis result for SHA-256 24bbb843e87be273…

MALICIOUS

PDF

37.3 KB Authoring application: Smallpdf Desktop
MD5: c6d63c73f944fa4ec4dfed75f0648bbe SHA-1: 50b388a2aae8d3ac1cbbdeff69dd2665d1a113b6 SHA-256: 24bbb843e87be273bf508f11753edc87cdd2f3ff4d4aa39ae6b24879bbe4e165
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, identified as a link farm, designed to redirect users to malicious PDF content. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs are the primary indicators of compromise, likely serving as droppers for further malicious payloads.

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.
  • 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://milopb.weebly.com/uploads/1/3/0/4/130488401/petenor_xorofuvaxusivuz_warenadomug.pdf
    • http://chromationspec.com/uploads/1/3/0/3/130379611/6614645.pdf
    • http://wobejekog.bordadosymaschercross.com/uploads/2020/01/27/vinuxejunujuzafanezo.pdf
    • http://motorshoweast.com/uploads/1/3/0/5/130543656/3041335.pdf
    • http://forsheylaw.org/uploads/1/3/0/4/130435690/1545d221aa71.pdf
    • http://leopoldconst.com/uploads/1/3/0/6/130604225/tobofamobu-rinuzonubus-nadukepi.pdf
    • http://gubomepuso.answerforhere.xyz/uploads/2020/01/28/lenupasasazipaf.pdf
    • http://guvusiliva.cncsnab.ru/uploads/2020/01/28/320935.pdf
    • http://jodizotedu.blamecharlie.com/uploads/2020/01/28/4520235.pdf
    • http://zave.wifiavto.ru/uploads/2020/01/28/wowipam-sikesorugefok-dufixodulala.pdf
    • http://minusute.sisinfdoctum.tech/uploads/2020/01/28/sigag.pdf
    • http://michkah.com/uploads/1/3/0/5/130550986/4469916.pdf
    • http://shoplaalee.com/uploads/1/3/0/2/130291373/1943184.pdf
    • http://likeruwit.shoplrr.info/uploads/2020/01/29/rerolisanid-zidapewidab.pdf
    • http://r-mustangs.com/uploads/1/3/0/2/130288447/familamasojut_vazuguzut_liteb_gibegofigow.pdf
    • http://sezofosux.rossip.ru/uploads/2020/01/29/1256698.pdf
    • http://mysteryshoppingonlinejob.com/uploads/1/3/0/6/130604860/11ceac183ccb8b.pdf
    • http://sweetlyavas.com/uploads/1/3/0/6/130640057/76ac4d4e.pdf
    • http://addisonfluids.com/uploads/1/3/0/6/130604126/funuwimos-zutidawutefebu-fotuv-bosabubabamiri.pdf
    • http://larakjcampbell.com/uploads/1/3/0/5/130551064/zikem_sazune.pdf
    • http://boxaf.antivirussprotectonline.xyz/uploads/2020/01/28/2671698.pdf
    • http://bcssummerlanguagecamp.com/uploads/1/3/0/6/130604574/130604574.html#simple+future+tense+worksheet+grade+3

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000016cc.bin
0a6fea05b6f82bfef620af5b67410cc7a9f8e0230ee2e913e6447b3a7ae304a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16CC 8140 bytes

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