Malicious PDF — malware analysis report

Static analysis result for SHA-256 250d8ac6add7edb0…

MALICIOUS

PDF

47.0 KB Authoring application: Serif PagePlus
MD5: ca032fbb50be3786ca767f18edd4ac9e SHA-1: f435ff745ec16aa86874ca3a8bbb46e9710d91ac SHA-256: 250d8ac6add7edb0b6b509fe6a8bfe8b788911eb8553f8bd473ee67b87de62d7
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO manipulation or to distribute malware. The ClamAV detection and ML classifier strongly indicate malicious intent. No scripts were extracted from this sample, but the extensive link farm suggests a delivery mechanism for further malicious content.

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://meridiansq.com/uploads/1/3/0/5/130550704/fosakito-korujisi.pdf
    • http://nathanpeachey.com/uploads/1/3/0/4/130478110/5165669.pdf
    • http://keopukonacoffee.com/uploads/1/3/0/2/130272918/9234110.pdf
    • http://exquizicboutique19.org/uploads/1/3/0/4/130489052/6355693.pdf
    • http://airoparkourfreerun.com/uploads/1/3/0/4/130490117/muzujirudos.pdf
    • http://studentsandcollege.com/uploads/1/3/0/5/130590142/5522040.pdf
    • http://mentesconscientes.org/uploads/1/3/0/6/130639321/kodelorusiluxekexa.pdf
    • http://juwi.g-gladiolus.ru/uploads/2020/01/29/d47620d0991d8dc.pdf
    • http://wit.aewjasw.icu/uploads/2020/01/29/romukajogegir.pdf
    • http://baru.astys.ru/uploads/2020/01/27/xaromutow_daves_kozobamuzaz_dunuwira.pdf
    • http://bakerlawga.com/uploads/1/3/0/2/130271111/sufowazodez.pdf
    • http://myinfoviews.com/uploads/1/3/0/4/130488935/gawavuzamojo.pdf
    • http://2325maurystreet.com/uploads/1/3/0/6/130620296/76a23a8a.pdf
    • http://weworapig.race-charter.ru/uploads/2020/01/28/guxikuxidexutoma.pdf
    • http://rotaract4100.org/uploads/1/3/0/6/130639461/movalixetowubef.pdf
    • http://carbonneutralshef.weebly.com/uploads/1/3/0/4/130489081/xakuraxo-bukirepegeri-jawulupezugotit.pdf
    • http://cbbankclassic.com/uploads/1/3/0/4/130476066/kiraxupasevigi.pdf
    • http://natinelflowersandlinens.weebly.com/uploads/1/3/0/2/130272102/5298123.pdf
    • http://midwestmusclebullyclub.com/uploads/1/3/0/2/130272482/9757783.pdf
    • http://greensboromusicteachers.org/uploads/1/3/0/4/130476429/6724114.pdf
    • http://renegadegreens.com/uploads/1/3/0/3/130312972/vorep_xovegoxakime_nuvudozirogojuk.pdf
    • http://asharedmemory.com/uploads/1/3/0/6/130639891/130639891.html#phpspreadsheet+reader+xls
    • http://greensboromusicteachers.o

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010e2.bin
65441ffd13ddbfe4ff92dac002b644f3b60bdc7e939451b8fd3018c67ee611b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2 8640 bytes

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