Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f58f556e565954b…

MALICIOUS

PDF

37.3 KB Authoring application: LibreOffice
MD5: ee727bc47443a073710063d61572b545 SHA-1: e129522373ce53d5058e4f0871ab8fc407dc8e4e SHA-256: 8f58f556e565954b63536ce92adfe1dc443f1f11939261187993972d80d7374b
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs pointing to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for malicious content, as flagged by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection further support its malicious nature. No scripts were extracted from this sample, and the document body content was largely unreadable.

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://jboomer.net/uploads/1/3/0/4/130483895/wikoz_gebawe_pigowedak.pdf
    • http://www.romelocalguides.com/uploads/1/3/0/4/130488955/6694728.pdf
    • http://codyjscott.org/uploads/1/3/0/7/130776695/5502093.pdf
    • http://hostmaster.aveac.org.uk/uploads/1/3/0/8/130814763/pigupexabivu.pdf
    • http://bombaspeerless.com/uploads/1/3/0/8/130874153/bbca00e0f.pdf
    • http://www.chloeraywarmoth.com/uploads/1/3/0/4/130489742/fodakaxamofiru-pewabefetepu-burujikaje.pdf
    • http://scwaterfrontworks.com/uploads/1/3/0/5/130588588/savazolodare-bilozod.pdf
    • http://mrmcanally.com/uploads/1/3/0/6/130604358/d7f31e474abd9a.pdf
    • http://decaldenn.com/uploads/1/3/0/6/130620619/kolabamijovufuj-wotejob.pdf
    • http://777lvloans.com/uploads/1/3/0/4/130435531/4718223.pdf
    • http://primebusinesschecks.com/uploads/1/3/0/4/130483273/6159955.pdf
    • http://bakersbible.online/uploads/1/3/0/5/130551558/kotuluvujikoxew.pdf
    • http://pyrowinecompany.com/uploads/1/3/0/5/130588434/zitibewepijit_tijajeva_ruxirokuge_menezenupu.pdf
    • http://sta-66-99-58-204.ladse.org/uploads/1/3/0/4/130476062/130476062.html#how+to+compress+pdf+file+size+online+below+100+kb
    • http://pyrowinecompany.com/uploads/1/3/0/5/130588434/zitibewepijit_tijajeva_r

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000038b7.bin
d8bfe879beeed268379dae7cc801c0eb54b7310289d2afe898c3e44f37bb941c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x38B7 8012 bytes

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