Malicious PDF — malware analysis report

Static analysis result for SHA-256 41cc54486c53d8fc…

MALICIOUS

PDF

37.5 KB Authoring application: Mobipocket Creator
MD5: c3aa77dbf4e1574c5bbf9d0a572165c3 SHA-1: 3fd2f10d6b02b31ec6c10ad68f395c58500449db SHA-256: 41cc54486c53d8fc3dcafbf6543dd5b514757bcd5a1110a9dc6de2f767032720
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. This suggests a phishing or SEO manipulation campaign. The ML classifier and ClamAV detection strongly support the malicious verdict. No scripts were extracted, and the document body contained mostly binary data, making it difficult to ascertain the exact user-facing lure.

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://neighborhoodinvolve.org/uploads/1/3/0/2/130288383/witoxo.pdf
    • http://thealexispuhlick.com/uploads/1/3/0/5/130546283/vibawiwonufavi.pdf
    • http://ohioawnings.com/uploads/1/3/0/3/130312993/3f69f53e.pdf
    • http://naileddailycom.com/uploads/1/3/0/4/130483978/tekarigurip.pdf
    • https://jawekedebajoz.weebly.com/uploads/1/3/0/3/130324092/zivatuvivupevekix.pdf
    • http://opmetoc.com/uploads/1/3/0/2/130288410/880bc715aeae7.pdf
    • http://aquariusfunding.com/uploads/1/3/0/3/130313272/520654.pdf
    • http://shopwani.com/uploads/1/3/0/2/130272585/wixuwi-roterakurujidiv-mokot.pdf
    • http://btccn.pw/uploads/2020/01/29/jagazejip_dexugitimupevoz_wepofupogiwibaw.pdf
    • http://bentcopper.com/uploads/1/3/0/4/130483396/gores.pdf
    • http://larur.betasproject.online/uploads/2020/01/29/gabudidi.pdf
    • http://russianboutique.co.uk/uploads/1/3/0/2/130273798/9591251.pdf
    • http://orangepeelyoga.com/uploads/1/3/0/5/130551896/1556745.pdf
    • http://lottomagico.com/uploads/1/3/0/5/130588346/0cf0af0b.pdf
    • http://1ststeptolife.com/uploads/1/3/0/2/130291975/6918285.pdf
    • http://grandbrand.org/uploads/1/3/0/4/130478975/mijoxivifotaraf.pdf
    • http://thebao.house/uploads/1/3/0/2/130274330/wepuzifigaxopup.pdf
    • http://miraprintservices.com/uploads/1/3/0/3/130379424/bedaxamodevetuzawe.pdf
    • http://newhampshireantiquecoop.com/uploads/1/3/0/4/130483244/fejuriju-wesonobu.pdf
    • http://gaziwerol.pcmservices.xyz/uploads/2020/01/29/2822204.pdf
    • http://uniquelyyourslandscapes.com/uploads/1/3/0/4/130435781/129c5843.pdf
    • http://nrbardwell.com/uploads/1/3/0/4/130476778/130476778.html#watch+the+real+housewives+of+new+jer

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000015f6.bin
0ad6b7fb1625e7312e3edd3b639bfff25346c42c2a0e570a2c7ccccb63064d30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15F6 7856 bytes
font_01_sfnt_off0000547e.bin
be7acebb918112476a9f8536c0cb22409c8d798b2d409f02b21d7c591f3c0a10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x547E 2496 bytes

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