Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc26102f49bf9659…

MALICIOUS

PDF

42.0 KB Authoring application: Nitro PDF
MD5: f409595a45e7c3ea330e144e7ba079c5 SHA-1: f963d0fe059435b3a984f008b1de3a5783d7288f SHA-256: fc26102f49bf9659470f51dcc7f24c4c696ccf039a280ea1f4a8f3adf4facd39
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically classified as phishing. No scripts were extracted from this sample, and the document body text is heavily corrupted, making it difficult to ascertain the exact lure.

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://adcounselling.net/uploads/1/3/0/4/130489230/kagasiledurerinapef.pdf
    • http://healthiersoils.com/uploads/1/3/0/7/130740232/9761621.pdf
    • http://cmisafes.com/uploads/1/3/0/6/130604349/9583859.pdf
    • http://bespokely.com/uploads/1/3/0/6/130620230/dojetolirunedi.pdf
    • http://o2smallhouses.com/uploads/1/3/0/7/130739315/5390854.pdf
    • http://blockedbyfire.com/uploads/1/3/0/5/130539612/xogizawebiviz_dikomefe_talewunazexevib_jebupebekuta.pdf
    • http://replenishmysoul.com/uploads/1/3/0/6/130603696/fanokewojejelixo.pdf
    • http://stephaniejacobs-sculptures.com/uploads/1/3/0/6/130639083/c1d62318ea.pdf
    • http://bevilacquaguitars.com/uploads/1/3/0/5/130588679/pujebipi-xixonawevuju-benuz-gazuvute.pdf
    • https://voxisava.weebly.com/uploads/1/3/0/5/130540402/4778433.pdf
    • http://mhrandlenovels.com/uploads/1/3/0/7/130740258/130740258.html#army+pt+test+standards+male

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001282.bin
a3792e638117fafd54f14ffe6bb45807b292a1acf799935f65f32c0af5536126		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1282 7956 bytes
font_01_sfnt_off00005e1a.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E1A 16036 bytes

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