Malicious PDF — malware analysis report

Static analysis result for SHA-256 efe2c9125283b00d…

MALICIOUS

PDF

38.2 KB Authoring application: Nitro PDF
MD5: a4cbf126e9aa5fa66c5d6af53c7fe350 SHA-1: beda31478c21d0c5a18229d2f870d1ae51b3a62d SHA-256: efe2c9125283b00d1a5e6916cad97aeb468bf9aa6adf00468ee3483f3fef99bf
150 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'SEO link farm', pointing to other PDF files hosted on various domains. The document body, despite being heavily obfuscated, mentions '9th grade math problems and answers pdf', suggesting a lure to trick users into downloading further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

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://sweatdujour.com/uploads/1/3/0/7/130739856/xukukurojelabo_zisezimuwoj.pdf
    • http://thestoopp.com/uploads/1/3/0/7/130776854/xiwuwodedex.pdf
    • http://firedragonpress.com/uploads/1/3/0/9/130969372/a4716ebde0.pdf
    • http://aprginc.com/uploads/1/3/0/7/130738996/nigeg_godemem_serulofujid.pdf
    • http://kasbuildingservices.co.uk/uploads/1/3/0/5/130588962/fapitazawaf.pdf
    • http://thedubdesigners.com/uploads/1/3/0/5/130541443/4757446.pdf
    • http://northparkvoicestudio.com/uploads/1/3/0/2/130270936/vogoro.pdf
    • http://chapelhill.plus/uploads/1/3/0/7/130776034/vudasopudax.pdf
    • http://ndbc-shanghai.com/uploads/1/3/0/5/130550968/buzasopip_lisadaro_sazaruxosiwesod.pdf
    • http://jennycarroll.com/uploads/1/3/0/7/130739652/5219843.pdf
    • http://www.haamsa.com/uploads/1/3/0/8/130814060/564ac1.pdf
    • http://honda-va.com/uploads/1/3/0/5/130589216/2936589b166c9b2.pdf
    • http://kickette.net/uploads/1/3/0/6/130620965/1517474.pdf
    • http://rainshawl.com/uploads/1/3/0/7/130740323/zotelade-gufimujux-sapigenin-mulevo.pdf
    • http://www.thejungletribune.com/uploads/1/3/0/6/130639962/448af70b31158.pdf
    • http://dazzlinggoddess.com/uploads/1/3/0/7/130739871/pejeresitiv-kokar-weromokopivi.pdf
    • http://431775997417950473.com/uploads/1/3/0/6/130604896/diluvazuniga.pdf
    • http://followthemap.ca/uploads/1/3/0/7/130739318/5398f0c.pdf
    • http://sustainability-consortium.com/uploads/1/3/0/4/130476469/ronebikusew.pdf
    • http://gastonmarijuanalawyer.com/uploads/1/3/0/6/130603922/1838584.pdf
    • http://toxicgolf.com/uploads/1/3/0/5/130589310/223f461682.pdf
    • http://host45.carmichaelnl.com/uploads/1/3/0/5/130544390/130544390.html#9th+grade+math+problems+and+answers+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003389.bin
bcbbd1c3814501a722271cc535578b45428ef0fc8fdbc45b4d12a329e5c90c98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3389 8384 bytes

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