Malicious PDF — malware analysis report

Static analysis result for SHA-256 74f75fda8532b969…

MALICIOUS

PDF

36.7 KB Authoring application: Smallpdf Desktop
MD5: 0d60cf206e9da301dee4fc3d6d7ef92e SHA-1: 35e61c9b25249bad00dbc8d29fc18e61cb5cdba2 SHA-256: 74f75fda8532b9697d8d463651cd5edad29961bc0a7fe0e3588818dbd67668f8
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded URLs pointing to external PDF files, indicating a potential link farm or distribution mechanism. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier's high confidence score suggest malicious intent. The presence of 'cmd.com' in the document text further supports the possibility of command execution or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://spccmd.com/uploads/1/3/0/5/130539238/pufopukas.pdf
    • http://mabisobe.seowallet.ru/uploads/2020/01/28/lurivi.pdf
    • http://pumideta.rutail.ru/uploads/2020/01/28/fokisajirogopik.pdf
    • https://waxidowuriwu.weebly.com/uploads/1/3/0/4/130483633/5c523cb.pdf
    • http://goldenheartsbb.com/uploads/1/3/0/3/130312985/60959d1.pdf
    • https://wowinaki.weebly.com/uploads/1/3/0/2/130288542/kozafivazibu.pdf
    • https://pipovakonilofo.weebly.com/uploads/1/3/0/5/130551809/544c616.pdf
    • http://sweetestdreams.org/uploads/1/3/0/6/130622012/bofusazokogo.pdf
    • http://116pinehill.com/uploads/1/3/0/5/130539223/2f8851b8047f98.pdf
    • http://somemecosmetics.com/uploads/1/3/0/6/130604441/3936823.pdf
    • http://nata.bookmeup.website/uploads/2020/01/29/tigirewejudaw.pdf
    • http://kivaxotet.rollosolar.com/uploads/2020/01/28/jubosefapitug.pdf
    • http://vakaje.maxclinesp.com/uploads/2020/01/28/4464003.pdf
    • http://rutot.cityglush25.icu/uploads/2020/01/27/puzapuvo.pdf
    • http://hello-gorgeous-lashes.com/uploads/1/3/0/4/130436163/1091753.pdf
    • http://magdasita.studio/uploads/1/3/0/4/130488616/gafowajenekenuxuj.pdf
    • http://livup.zayms.icu/uploads/2020/01/27/kuzoputodasoroz.pdf
    • http://richmond-arts.com/uploads/1/3/0/4/130483140/9a0a46c841691de.pdf
    • http://gesoge.kuhni07msc.icu/uploads/2020/01/27/rikizeweset_figidonepexo_nuvamilil_jikixero.pdf
    • http://melfb.com/uploads/1/3/0/2/130273799/ee9c1bbc.pdf
    • http://junglejimswindowcleaning.com/uploads/1/3/0/5/130538939/dumow.pdf
    • http://firstworldnewpaltz.com/uploads/1/3/0/3/130323998/6ba49c0e3a0.pdf
    • http://molliemonahan.com/uploads/1/3/0/2/130273740/rudisufupunol.pdf
    • http://nobuhotelriyadh-fullsite.devsite-1.com/uploads/1/3/0/2/130271077/130271077.html#cool+brick+breaker+game

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000016d0.bin
eb1fa9946c1367e24ec7e3e05ba5bf577f60426cc6b3f45f9b88f73c8950d98d
pdf-font-stream PDF embedded font (sfnt) at offset 0x16D0 8568 bytes