Malicious PDF — malware analysis report

Static analysis result for SHA-256 578cf95a92f70da5…

MALICIOUS

PDF

32.1 KB Authoring application: PDFBox
MD5: b35c913d7bc10d45d69be64e1f9ebb14 SHA-1: 5a7e30e48bcec7b6b08ae7c68d80954a89ad0a71 SHA-256: 578cf95a92f70da59744fc5d4356927d0a6c34916a2592bce3aef60a4db86f58
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as phishing and potentially leading to malware installation. The embedded URLs are the primary indicators of compromise, likely serving as droppers or redirectors to further stages of the attack.

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://torontogreekdj.com/uploads/1/3/0/3/130313198/nepixedosokameraxep.pdf
    • http://nycpublishingco.com/uploads/1/3/0/6/130640144/razorefodabet.pdf
    • http://pastmaster.org/uploads/1/3/0/8/130873872/zeduganavojiv.pdf
    • http://paganacademy.org/uploads/1/3/0/2/130287463/bb43068.pdf
    • http://cagoldenpoppy.com/uploads/1/3/0/5/130588702/mifesovosofatute.pdf
    • http://morjana.net/uploads/1/3/0/3/130379424/621919.pdf
    • http://russlazaruk.com/uploads/1/3/0/2/130270946/b22ece4e474c59.pdf
    • http://ooredooqatar.net/uploads/1/3/0/8/130874180/jajewuwi-fexuvewumadume.pdf
    • http://www.thebourbondictionary.com/uploads/1/3/0/3/130323421/2759593.pdf
    • http://weirdkaraoke.com/uploads/1/3/0/6/130639162/gomagifesiwa.pdf
    • http://mohakshroff.net/uploads/1/3/0/6/130604425/senuvolesiju.pdf
    • http://www.leslierws3345.com/uploads/1/3/0/6/130604511/lexugolikotaduloz.pdf
    • http://mail.matthewcampbelljewelry.com/uploads/1/3/0/6/130621220/fowopawa-vujozubizaje.pdf
    • http://host30.carmichaelnl.com/uploads/1/3/0/7/130739212/130739212.html#guia+de+ejercicios+nomenclatura+quimica+organica

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000263d.bin
ab0b564581bc3c8df1d69095c7a40cea7f006c4fe3b08ca24170b28bc0a3071f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x263D 7776 bytes

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