Malicious PDF — malware analysis report

Static analysis result for SHA-256 96693fb5d3abe253…

MALICIOUS

PDF

34.0 KB Authoring application: Nitro PDF
MD5: e052dc781e63a6bb4fe63ad42e06e1ec SHA-1: 5761bf255aad663fcd87bbc9c4199df0c4c636a7 SHA-256: 96693fb5d3abe253506a9bbd3de04570e0ac163b4b87d1f554b187bafdae4154
152 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.TtraffRobotInstall-7605656-0 and a machine learning classifier. The heuristic PDF_SEO_LINK_FARM indicates the presence of a mass external PDF link farm with 31 links, predominantly hosted on gameknb.fun. The document body, though containing unrelated text about an AeroGarden manual, also contains a list of embedded URLs, reinforcing the link farm detection. This suggests the primary purpose is to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://gameknb.fun/uploads/2020/01/27/ginekowabido.pdf
    • http://tobig.twitterru.ru/uploads/2020/01/28/xipegalatim.pdf
    • http://sector-arm.ru/uploads/2020/01/28/2609003.pdf
    • http://global-migration-of-african-cuisine.com/uploads/1/3/0/3/130324030/7131991.pdf
    • http://track-tech.net/uploads/1/3/0/4/130476368/kifuv.pdf
    • http://nep.intelectovirtual.com/uploads/2020/01/27/zavox-doditepipagol-mopudowabaj.pdf
    • http://fosaniwudo.atrilmedia.com/uploads/2020/01/28/1fd56.pdf
    • http://evolveequineeducation.com/uploads/1/3/0/6/130603874/waxutarebezefefuge.pdf
    • http://augustahousekeeping.com/uploads/1/3/0/6/130620841/bolotafebujo.pdf
    • https://pupulajimuk.weebly.com/uploads/1/3/0/2/130271016/pakegenefazoziver.pdf
    • http://nounoucergy95.com/uploads/1/3/0/2/130288455/zekujomebozuf-samuloxama-vekunijefud.pdf
    • http://zezeve.mimosaweb.com/uploads/2020/01/28/761968.pdf
    • http://littlerookie.de/uploads/1/3/0/5/130550981/zilibesa.pdf
    • https://wepenaroki.weebly.com/uploads/1/3/0/3/130379824/wodofuxezulu.pdf
    • http://jak.texvideo.ru/uploads/2020/01/29/7ca86faa2c0ec.pdf
    • https://novazixiwevop.weebly.com/uploads/1/3/0/4/130478882/934308.pdf
    • http://lit.cheapoffice.ru/uploads/2020/01/29/78fab3c93fe.pdf
    • http://vuwaru.gotechsolucoes.com/uploads/2020/01/28/zonowedurowizavulis.pdf
    • http://fosaniwudo.atrilmedia.com/uploads/2020/01/29/6717944.pdf
    • http://xebedavufe.pulkovo3.info/uploads/2020/01/27/maruw_dagatofoxokifo.pdf
    • https://pifagateboketu.weebly.com/uploads/1/3/0/5/130588191/tevomipex_teburuwikawanal_xemax.pdf
    • http://cashxbank.com/uploads/1/3/0/5/130551604/f7dc1.pdf
    • http://zonuzidok.ckpiz.com/uploads/2020/01/27/c927c2c6337698.pdf
    • http://susandumond.org/uploads/1/3/0/2/130288421/dd91e.pdf
    • http://deardrew318.com/uploads/1/3/0/4/130489131/mureregunaxe.pdf
    • http://somersetfoodtrail.org/uploads/1/3/0/5/130540118/130540118.html#aerogarden+7+user+manual

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000016e7.bin
8d97b841ca9e0963a2112eee61a3a3a130796ac32c5d45e35aee247572785971		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16E7 7256 bytes

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