Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f5a755e5f5751e2…

MALICIOUS

PDF

37.0 KB Authoring application: OpenOffice.org
MD5: a73ec4dcdaac348522df2af076c65dc7 SHA-1: f37b9de71a9ef52a4dd2b25b809086f1039f3bb8 SHA-256: 7f5a755e5f5751e2d2964e5cedc6c332c69e6971368fbfe223779da3ccf242dc
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical rule for a large external PDF link farm and a machine learning classifier. The embedded URLs suggest a phishing or SEO spam campaign, likely intended to redirect users to malicious content or further stages of an attack. No scripts were extracted, but the presence of numerous external links points to a malicious intent to distribute further payloads or engage in phishing.

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://coachesportivo.com/uploads/2020/01/28/98e0b7924d6168.pdf
    • http://16dr.pw/uploads/2020/01/27/2149263.pdf
    • https://xodufokuzot.weebly.com/uploads/1/3/0/2/130289480/8020241.pdf
    • http://mountaincreekhotels.com/uploads/1/3/0/6/130605254/zawepox.pdf
    • http://northern-carbon.com/uploads/1/3/0/6/130605143/a93913d1a.pdf
    • https://kapedakit.weebly.com/uploads/1/3/0/2/130291939/fd537c4b3d53e6.pdf
    • http://judgeammendola.com/uploads/1/3/0/5/130589409/kuvazoxirama-kamabik-namowoxo-satevolu.pdf
    • http://wopati.zahopl.xyz/uploads/2020/01/27/6216246.pdf
    • http://ukchautauqua.weebly.com/uploads/1/3/0/6/130604688/2919347.pdf
    • http://tapthesky.org/uploads/1/3/0/6/130620873/9b7d0dc2f7316.pdf
    • http://vogam.qpeqwqj.info/uploads/2020/01/27/408a8455227.pdf
    • http://rustyreddog.com/uploads/1/3/0/5/130544725/534e1.pdf
    • http://my-pristinedental.com/uploads/1/3/0/5/130550790/kerogebojejawew_poravejeraxanek_dozukuwi.pdf
    • http://mrsparsons.net/uploads/1/3/0/5/130589124/130589124.html#excretory+system+parts+and+functions+worksheet

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001359.bin
fd0ac7966a84f5aa54fd69b24eea55694b7dc073218ee30d470b95382b1330bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1359 8244 bytes

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