Malicious PDF — malware analysis report

Static analysis result for SHA-256 839a35e365848094…

MALICIOUS

PDF

66.3 KB Authoring application: Scribus
MD5: dec81b81ad642b2041230fefee53fe21 SHA-1: 075d72710ef463dacfb1e29509944d4b224d58a2 SHA-256: 839a35e3658480941f91912ab69ac901ca760434317cf38b9b00b0ffcd40c75d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection tactic. ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output further support malicious intent. The document body, though heavily corrupted, contains URLs that are likely part of this link farm, aiming to direct users to malicious sites for further exploitation or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 https://bikisebojumovov.weebly.com/uploads/1/3/0/3/130323475/fojuti.pdf
    • http://disabilitymanagmentsolutions.ca/uploads/1/3/0/6/130640142/4603084.pdf
    • http://mab.vipiska-egrn-besplatno.icu/uploads/2020/01/29/5514096.pdf
    • http://norwichmonument.com/uploads/1/3/0/4/130475973/5533566.pdf
    • http://insightmedicine.net/uploads/1/3/0/6/130604249/8965440.pdf
    • http://ntechnologyinc.com/uploads/1/3/0/6/130604315/8913291.pdf
    • http://adentamalaysia.com/uploads/1/3/0/6/130604955/narujod-tixowozibofax.pdf
    • http://mycorporateteambuilding.com/uploads/1/3/0/6/130603922/gamebez-vexedelaj.pdf
    • http://discourse-x.com/uploads/1/3/0/6/130620302/kudikalazasa-ranajineb-jodexatalo.pdf
    • http://sveos.net/uploads/1/3/0/6/130604601/887f2bbb48c6.pdf
    • http://jessicagaul.com/uploads/1/3/0/8/130814343/xadaloxejiz-zirele-lapoxugata.pdf
    • http://bbeboutiquellc.com/uploads/1/3/0/6/130639023/130639023.html#political+map+of+india+with+states+and+capitals
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000013a1.bin
98baf80631631956eff66ff91a574f10e83bb53236f5275e831b69637a752501		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A1 8684 bytes
font_01_sfnt_off0000c16a.bin
941a0206dc8af20055fe54bfe4a938706a51537092f1136cc4678225ccaa02ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC16A 6912 bytes

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