Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ba373cd0bd25215…

MALICIOUS

PDF

44.0 KB Authoring application: Smallpdf Desktop
MD5: a3ad7879f85550336b8576eefe31fac0 SHA-1: 7509f65ca24a88f9e78f309b045001e2147212f7 SHA-256: 6ba373cd0bd25215eda7ae10d57ec30e2528f55c843a13b6b426e4cafc17f706
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of embedded URLs pointing to external PDF documents, indicative of a link farm or SEO poisoning attack. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, 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://yokel411.com/uploads/1/3/0/4/130483110/1671151.pdf
    • http://fazobidawa.kesh-dev.com/uploads/2020/01/28/widoz.pdf
    • http://naturallyfierceandbeautiful.com/uploads/1/3/0/6/130639836/787ef624.pdf
    • http://thriftstorehemet.com/uploads/1/3/0/6/130621030/6bd87e59b49b.pdf
    • http://safebeautymovement.org/uploads/1/3/0/5/130545097/29e02bfb6.pdf
    • http://mychoicewellness.com/uploads/1/3/0/6/130603969/kowoti-kexazufev-nobotuvagemam-duzudizegem.pdf
    • http://kireilifetherapy.com/uploads/1/3/0/5/130539678/torixozoxi.pdf
    • http://tampa321sold.com/uploads/1/3/0/6/130620365/4906847.pdf
    • http://gefepubi.clck.biz/uploads/2020/01/29/3a0899002dcf.pdf
    • http://desatascosbarcelona.org/uploads/1/3/0/6/130621535/86ed0943c167.pdf
    • http://orangecountybestwindowtinting.com/uploads/1/3/0/6/130620865/130620865.html#marriott+electrocardiography+pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000128a.bin
7d8474535cfc4fae28dc2b1446b2c7c0df73c23e99e9bc90db64c024d6df6a8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128A 8836 bytes
font_01_sfnt_off000065fd.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65FD 16036 bytes

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