Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e9a247affdb4fc8…

MALICIOUS

PDF

50.1 KB Authoring application: Smallpdf Desktop
MD5: a2c05772fb2cf0eb3162d480861a1b25 SHA-1: 5ad5154267d96cc326c7b5b492fae2c5f985eea3 SHA-256: 4e9a247affdb4fc8ed385dfeaaff17a4e93c6779401cef024b89cde79116c1ac
150 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a tactic to manipulate search engine results or distribute malicious payloads. The ClamAV detection and ML classifier further confirm the malicious nature of this PDF, likely used as a lure or phishing document.

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://mscgis.net/uploads/1/3/0/6/130605204/temop.pdf
    • http://delucaconsulting.se/uploads/1/3/0/6/130621651/1609724.pdf
    • http://varcoallied.com/uploads/1/3/0/3/130313010/6757334.pdf
    • http://bellamayphotography.com/uploads/1/3/0/2/130291544/89627a01a0.pdf
    • http://rubberbymok.com/uploads/1/3/0/6/130622089/5232013.pdf
    • http://adayofhope.co/uploads/1/3/0/6/130639083/vuvupekexapeg.pdf
    • http://ssmonogramsonline.com/uploads/1/3/0/2/130289485/dodeja.pdf
    • http://temperamentsart.com/uploads/1/3/0/2/130287419/3151534.pdf
    • http://soselectrical.co.nz/uploads/1/3/0/6/130639266/7278061.pdf
    • http://acouturelife.com/uploads/1/3/0/6/130620407/130620407.html#mystical+words+of+power+damon+brand+pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011cd.bin
1da38dd45c87f36bdda075e40288717fa5c3a5b9b0893d3f7f15fc4c997be2f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD 8600 bytes
font_01_sfnt_off00007ccf.bin
a88a3252a732d83265545c0d7bca880eac5c53956b7c2c19aa40bc62a0bd5b2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CCF 16492 bytes

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