Malicious PDF — malware analysis report

Static analysis result for SHA-256 51bba4569a1d2770…

MALICIOUS

PDF

47.3 KB Authoring application: Pdftk
MD5: da639abe0413d502d9087781ade216e3 SHA-1: 0e2cebce231eb1373179b338d827df9190569eb3 SHA-256: 51bba4569a1d2770feaa86cef64e2209607abe0139285fbd320a2e63f06381bf
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. The PDF_SEO_LINK_FARM heuristic indicates the presence of a large number of embedded external links, with the primary domain being babacoolpc.com. The document body contains garbled text, suggesting it is not intended for direct user consumption but rather to host these links. The primary attack pattern involves redirecting users to a vast collection of other PDF files hosted on various domains, likely as part of a link farm or phishing campaign.

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://babacoolpc.com/uploads/1/3/0/5/130539494/4c18be4.pdf
    • http://decojewelry.net/uploads/1/3/0/7/130739887/milemesikub.pdf
    • http://www.radioteleunite.com/uploads/1/3/0/6/130604654/3537820.pdf
    • http://totalpartymakover.com/uploads/1/3/0/6/130621784/tiluvidorax.pdf
    • http://tigerkrewe.com/uploads/1/3/0/4/130436154/zolumepefafe_sixibegis_luzewegosam_durov.pdf
    • http://countryrentalinfrance.com/uploads/1/3/0/5/130590499/9feef2460.pdf
    • http://vividautosolutions.com/uploads/1/3/0/5/130551656/fuwin.pdf
    • http://attunedreach.com/uploads/1/3/0/7/130776605/vofepedagid.pdf
    • http://projectcleanuluwatu.com/uploads/1/3/0/2/130272260/63d57.pdf
    • http://www.prettylittlesecrets4you.com/uploads/1/3/0/2/130270923/zavalumogota.pdf
    • http://stickittolennon.com/uploads/1/3/0/6/130604529/1dc6f.pdf
    • http://5thwoman.com/uploads/1/3/0/4/130492441/kuzim.pdf
    • http://connorcopelandcreative.com/uploads/1/3/0/7/130776358/wedarexabinipuzoxate.pdf
    • http://trade.jeffriesvintagedrinks.com/uploads/1/3/0/6/130639269/papifonalire.pdf
    • http://landscoveclays.co.uk/uploads/1/3/0/3/130323212/felozufon.pdf
    • http://chrisramseyart.com/uploads/1/3/0/3/130379222/sijofelepasexop-wisoje-xonenuto.pdf
    • http://www.gbanko.com/uploads/1/3/0/6/130639848/gubupad.pdf
    • http://mrcmuskogeerevivalcenter.org/uploads/1/3/0/8/130814900/6011367.pdf
    • http://74-123-78-192.mgwnet.com/uploads/1/3/0/7/130738735/130738735.html#afterburn+movie+gerard+butler

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005786.bin
c37c2238d5431db74099554d6cbd132fe15ee5303c7a15960a8f01aca1d75a6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5786 10360 bytes

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