Malicious PDF — malware analysis report

Static analysis result for SHA-256 f31d467797065b8f…

MALICIOUS

PDF

39.7 KB Authoring application: OpenOffice Draw
MD5: 002e49f9dbda6593a196bfe76a15a335 SHA-1: e8edebee5303825f98c2fc510d1fa2a2ff6a6512 SHA-256: f31d467797065b8fb46849ae83a1b7429a74051cc1d8ffb9b6c86be7ec2501fe
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, for malicious content. The critical PDF_SEO_LINK_FARM heuristic indicates the presence of 31 external PDF links, with the first being http://babyfairy.org/uploads/1/3/0/5/130551241/rukuzuxuxufe.pdf. This suggests a phishing or malware distribution campaign leveraging a link farm to obscure the true malicious destination. 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.
  • 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://babyfairy.org/uploads/1/3/0/5/130551241/rukuzuxuxufe.pdf
    • http://alphadecorandpainting.com/uploads/1/3/0/6/130621749/1394570.pdf
    • http://viniciusmelo.online/uploads/2020/01/27/7af1f.pdf
    • http://naka-g.creps-inc.jp/uploads/1/3/0/2/130271023/a2dcc208fa.pdf
    • http://destiny-outreach.org/uploads/1/3/0/5/130551475/vefozepukijaxugedare.pdf
    • http://wayjayjetwas.com/uploads/1/3/0/4/130483110/zimoz_puleki_mopidemetagu_genotonik.pdf
    • http://sgarrigues.net/uploads/1/3/0/4/130483155/1b90a010ac826.pdf
    • http://nantymoelprimary.com/uploads/1/3/0/2/130292089/7629837.pdf
    • http://bluecanyongameconservancy.com/uploads/1/3/0/5/130588687/5837089.pdf
    • http://dolojif.difmed.com/uploads/2020/01/28/5681364.pdf
    • http://blaks.online/uploads/2020/01/28/suvetobajul.pdf
    • http://kenbugulfilm.com/uploads/1/3/0/6/130604286/sasopasok_natajusaduripe.pdf
    • http://sozil.mir-tattoo.ru/uploads/2020/01/28/37d9a9.pdf
    • http://whoisthatvoice.com/uploads/2020/01/27/578aa2e.pdf
    • http://halfdozenmonkeys.com/uploads/1/3/0/6/130605198/8805979.pdf
    • https://boboxevilizigu.weebly.com/uploads/1/3/0/6/130604336/nupumum-jibovesubitureg.pdf
    • http://necdm.com/uploads/1/3/0/4/130476859/5074113.pdf
    • http://sulavorito.nvprint-yug.ru/uploads/2020/01/29/9228800.pdf
    • http://bifovopi.restavratsiya.com/uploads/2020/01/28/2012479.pdf
    • http://xunisa.en-help.center/uploads/2020/01/28/4c47707bc3ba26.pdf
    • https://kinutepexugupef.weebly.com/uploads/1/3/0/4/130436188/1f93a711cf192.pdf
    • http://northeastohiodukes.com/uploads/1/3/0/6/130603836/9890302.pdf
    • http://luzoniduj.dfd.ru/uploads/2020/01/28/7466830.pdf
    • http://nobuhotelriyadh-fullsite.devsite-1.com/uploads/1/3/0/6/130605387/130605387.html#abecedario+letra+por+letra+para+imprimir+cursiva

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001711.bin
ad2d7fd2e77dbfd798ba8b91b286182ca22b3a404a7eb3d2875f2f720c80e17a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1711 9628 bytes

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