Malicious PDF — malware analysis report

Static analysis result for SHA-256 df99c01f571d07d1…

MALICIOUS

PDF

34.0 KB Authoring application: Smallpdf Desktop
MD5: afc8e446884a59d01ba177fd01942730 SHA-1: 77c8d59e234c2310094375fd62ba09ad782471cc SHA-256: df99c01f571d07d11254b8285c41a9a7e1ec3f6e66dc85ede12c5ff2ce111bac
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files hosted on various domains, indicating a link farm or redirection scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded URLs are the primary indicators of compromise.

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://bsa-sccc-pack301.com/uploads/1/3/0/4/130436494/vomowajuluwazodukewi.pdf
    • http://skidayz.co/uploads/1/3/0/6/130604079/kesedapuf_nulekoz_viperorebab_sevavumeged.pdf
    • http://msatpartners.com/uploads/1/3/0/3/130379741/937dc8.pdf
    • http://wyomingvalleymedical.com/uploads/1/3/0/4/130476940/b20f7ed6.pdf
    • http://montiniplanning.com/uploads/1/3/0/3/130323493/5673189.pdf
    • http://wadsworthpersonalinjury.com/uploads/1/3/0/7/130738874/nunapatoweruvidanixa.pdf
    • http://slaverydatabase.com/uploads/1/3/0/6/130605368/pasulofedezuke.pdf
    • http://inspiredlivingwares.com/uploads/1/3/0/6/130604886/zidug.pdf
    • http://isclinical.net/uploads/1/3/0/2/130270843/vemop.pdf
    • http://lazyequalsbroke.com/uploads/1/3/0/3/130379232/bolevomezavixov.pdf
    • http://www.easton-personalinjurylawyer.com/uploads/1/3/0/2/130272985/77e9dab3a52e.pdf
    • http://lw8bn.bpmtc.com/uploads/1/3/0/7/130740389/130740389.html#ielts+liz+reading+lessons+information+tips

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e9e.bin
3bf29aac5a720d8388ad8528a35a869ec45145c96bb2012d3b30210e498c4d3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2E9E 7668 bytes

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