Malicious PDF — malware analysis report

Static analysis result for SHA-256 557ce6b736a048a9…

MALICIOUS

PDF

68.3 KB Authoring application: Nitro PDF
MD5: 05355308779fc0977da70d2ccb7a8bef SHA-1: 532f815a812e63d001d7f901371efd70c2e722e7 SHA-256: 557ce6b736a048a9aaa97cdd1b01127d8d1021937a840f0a7dab34e81548a63e
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and a machine learning classifier, as malicious. The primary indicator is the presence of a large number of embedded external links, identified as a 'PDF_SEO_LINK_FARM'. These links likely lead to phishing or malware distribution sites. The document body contains a mix of legitimate-looking text and the embedded URLs, suggesting a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://shophairbytara.com/uploads/1/3/0/3/130323211/lutegekir-liraliv-jusoviwu.pdf
    • http://www.emorylanedesigns.com/uploads/1/3/0/6/130639294/e828827d79.pdf
    • http://sewmazingquilting.com/uploads/1/3/0/4/130436068/4190560.pdf
    • http://doctorberrycoaching.com/uploads/1/3/0/2/130289424/8535438.pdf
    • http://nadinebrockel.de/uploads/1/3/0/7/130739290/fosokumetukote-bomewureja.pdf
    • http://optoutattorneys.com/uploads/1/3/0/3/130323659/4503814.pdf
    • http://www.fouryearoption.com/uploads/1/3/0/5/130550960/fanufinu_sujopanasisod.pdf
    • http://www.raatrening.no/uploads/1/3/0/6/130621800/jidum.pdf
    • http://prettyplump.com.au/uploads/1/3/0/7/130775201/9397562.pdf
    • http://623.bpmtc.com/uploads/1/3/0/6/130603907/7913677.pdf
    • http://magentabuild.com/uploads/1/3/0/6/130621588/piwelamujazuru.pdf
    • http://southernangelboutique.net/uploads/1/3/0/6/130603894/8a36d5f.pdf
    • http://toptieragent.com/uploads/1/3/0/7/130774993/6836818.pdf
    • http://www.janestorm.website/uploads/1/3/0/5/130590578/1544925.pdf
    • http://madisonbaker.net/uploads/1/3/0/2/130289651/e2755.pdf
    • http://warriorkingmma.com/uploads/1/3/0/5/130551137/725816b3b5f.pdf
    • http://yulechengtikuansudukuai.br3h.com/uploads/1/3/0/8/130873798/130873798.html#industrial+wastewater+treatment+processes

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000028a3.bin
b2b543183c52616560e0abe1632e89c1230c36b7caedf83588c71564394d252c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28A3 8360 bytes

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