Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf65efc6e3a99c14…

MALICIOUS

PDF

40.8 KB Authoring application: Smallpdf Desktop
MD5: 02a77ce3913c80966b27ee7f7a730f82 SHA-1: bcd10f0965750a8440035fdcd5d1b59721798d5e SHA-256: bf65efc6e3a99c1467dddb0c1ec9ef7f76f1cfc513d36b2611869222098f5700
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM', with the primary malicious URL being http://dofemupeki.site-elit.ru/uploads/2020/01/28/dajalufexetiresulera.pdf. ClamAV also detected this file as 'Pdf.Phishing.TtraffRobotInstall-7605656-0', indicating a phishing or malware distribution intent. The document body, though heavily truncated and containing garbled text, mentions 'Smallpdf Desktop' and 'HappyMod', suggesting a lure to download or interact with seemingly legitimate software, which is a common phishing tactic.

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://dofemupeki.site-elit.ru/uploads/2020/01/28/dajalufexetiresulera.pdf
    • https://xejosabuvijepaz.weebly.com/uploads/1/3/0/5/130539718/92071019.pdf
    • http://mycoloradoorthodontist.com/uploads/1/3/0/3/130379426/mapudadalikag_birotepodewaxu_jimixerer.pdf
    • http://fakeda.no-nt.online/uploads/2020/01/29/nofedepibe.pdf
    • https://vibetegoz.weebly.com/uploads/1/3/0/3/130313192/1974516.pdf
    • http://widisado.gochu.ru/uploads/2020/01/28/3ba7cc3db0.pdf
    • http://newlifefitz.org/uploads/1/3/0/3/130379506/9229040.pdf
    • http://lorenove.avteurope.com/uploads/2020/01/28/dizoxoxiwobe.pdf
    • http://leighgardinerphysiotherapy.com/uploads/1/3/0/3/130379447/97924.pdf
    • http://theshiatsuroom.co.uk/uploads/1/3/0/3/130323594/8098413.pdf
    • http://ram78.ru/uploads/2020/01/27/radotifov-sikejeg-jisibirazu.pdf
    • http://sgmurphy.com/uploads/1/3/0/6/130621426/6688862.pdf
    • http://trikamethod.site/uploads/2020/01/28/4f5a24bd9.pdf
    • http://agoranurses.weebly.com/uploads/1/3/0/4/130488631/besajinivimidevuniv.pdf
    • http://commstech-hub.eisf.eu/uploads/1/3/0/4/130475994/b1580c719b63.pdf
    • http://landoflivingwaters.org/uploads/1/3/0/5/130551518/3467484.pdf
    • http://sumeza.ru/uploads/2020/01/27/4357f8.pdf
    • http://exchangehousetravel.com/uploads/1/3/0/5/130546153/dijowof_tixojase_jumafibisibuj_lubikobide.pdf
    • https://gufibedexita.weebly.com/uploads/1/3/0/2/130289524/jisofobewe.pdf
    • http://americanlighting.org/uploads/1/3/0/4/130489220/tubumesopotidoma.pdf
    • http://bdruken.weebly.com/uploads/1/3/0/3/130312974/buvujisanos_wolududig_pilolezeriweb.pdf
    • http://sbedard.ca/uploads/1/3/0/4/130489530/kukodoxogizane_gewejov_gakudagaba_dumabatogopi.pdf
    • http://codeundra.weebly.com/uploads/1/3/0/5/130551106/vakipafisi_gaxisunize_wakovowoduxeti.pdf
    • http://casparmckeever.com/uploads/1/3/0/4/130488152/2ea660.pdf
    • http://bifacomhynglfekd.weebly.com/uploads/1/3/0/4/130488295/kurosur-werawotesika-levavejes-gulivuxoxake.pdf
    • http://ncpimaging.com/uploads/1/3/0/5/130588983/130588983.html#bloomy+app+mod+apk
    • http://landoflivingwaters.org/uploads/1/3

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001871.bin
a7ffd8798a3b4c294d4b8c8ba2c4d56d679ab328afc5be21c80cc9938a220ae1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1871 8860 bytes