Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b39858032cb629f…

MALICIOUS

PDF

43.8 KB Authoring application: OpenOffice.org
MD5: b534249a5299c093a8977eb2169063cc SHA-1: 88960ca03eafefcc4f6b33d2b379385ff063c5f8 SHA-256: 1b39858032cb629fd1d05b359970f40691dd5c613a63ede88138e0aa66ef233b
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical finding for a 'PDF_SEO_LINK_FARM' and ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0'. The presence of 24 external PDF links, many pointing to domains with generic or suspicious naming conventions, strongly suggests a phishing or malware distribution campaign. The ML classifier also returned a high confidence score for maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://transportlipigorski.pl/uploads/1/3/0/5/130542870/5011492.pdf
    • http://www.juryseng.com/uploads/1/3/0/5/130589410/fodivi.pdf
    • http://mol650eraywebster.com/uploads/1/3/0/7/130775277/98dc2f268164e.pdf
    • http://codypartyblog.com/uploads/1/3/0/7/130739227/2790784.pdf
    • http://guruofbridge.com/uploads/1/3/0/8/130874386/4703007.pdf
    • http://corfiotholidays.com/uploads/1/3/0/4/130483232/gijugobelado.pdf
    • http://trustedfinancialpro.com/uploads/1/3/0/6/130604203/431093.pdf
    • http://www.petruzzellis.net/uploads/1/3/0/5/130541944/1eeac05697.pdf
    • http://riderevolution.com.au/uploads/1/3/0/2/130272981/pusefefugop.pdf
    • http://naumu.family/uploads/1/3/0/3/130323936/1643439.pdf
    • http://nhfrea.org/uploads/1/3/0/6/130605059/0c6979881587a7.pdf
    • http://eventfulacademy.com/uploads/1/3/0/6/130639205/69f6dc8671d.pdf
    • http://thetreeoflifeacupuncture.com/uploads/1/3/0/7/130776104/4813102.pdf
    • http://montessorilawrence.org/uploads/1/3/0/5/130540453/3e2af30.pdf
    • http://www.masoncitychristian.org/uploads/1/3/0/4/130488615/f13b0b.pdf
    • http://myoliveshack.com/uploads/1/3/0/6/130605217/2098977.pdf
    • http://www.trailerpartwarehouse.com/uploads/1/3/0/7/130776499/simegupadubataledoxu.pdf
    • http://www.voirin-bourgault.com/uploads/1/3/0/4/130488839/pujixurudizukiburit.pdf
    • http://mespinozamen.com/uploads/1/3/0/6/130639100/c4addd2826f.pdf
    • http://mmtip.com/uploads/1/3/0/5/130551418/791536.pdf
    • http://horizonsksu.com/uploads/1/3/1/0/131070750/zefuji.pdf
    • http://muktishakti.com/uploads/1/3/0/6/130639884/058d8c6.pdf
    • http://secretgourmetpicnic.com/uploads/1/3/0/6/130621845/1197921.pdf
    • http://www.himalayanmosaics.com/uploads/1/3/0/2/130291922/wikitujosav-fugafupugi.pdf
    • http://autodiscover.jhigh18.com/uploads/1/3/0/2/130291415/130291415.html#ielts+general+listening+test+time

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000300b.bin
f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x300B 16204 bytes
font_01_sfnt_off00004815.bin
052fef26191faff449defc7e50fa71123a8d52a1974b9a4276ee408ec35530c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4815 8036 bytes

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