Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5e5ae7dea82cee8…

MALICIOUS

PDF

36.4 KB Authoring application: Scribus
MD5: aee77013f7f976a283a6e7c9845ca976 SHA-1: d8c4e56b7d47a693211782eef8cf581421ecb096 SHA-256: e5e5ae7dea82cee85124a45b8e67392786c621e096ce4a73be295c0e17f484de
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs pointing to other PDF files hosted on various domains. This "link farm" behavior, combined with ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and a high ML classifier score, strongly suggests a phishing or redirection campaign. The document body itself contains garbled text and references to 'Arduino code for stepper motor pdf', which appears to be a lure to disguise the malicious intent.

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://stickyearth.net/uploads/1/3/0/6/130604342/3308320.pdf
    • http://mminstitutedsn.com/uploads/1/3/0/4/130489131/lakujaroxe.pdf
    • http://dcmserviceinc.com/uploads/1/3/0/5/130545360/1e120eda6.pdf
    • http://clickclackfitness.com/uploads/1/3/0/4/130436173/kipapopukuwenap.pdf
    • http://elementalcollapsesv.com/uploads/1/3/0/8/130813063/53e6c.pdf
    • http://hostmaster.rockwithbenefits.pt/uploads/1/3/0/4/130476045/jafuk.pdf
    • http://stylebyquilo.com/uploads/1/3/0/6/130639038/5700576.pdf
    • http://collinsphotography.org/uploads/1/3/0/6/130640009/6b1dc.pdf
    • http://nissanfigaro.net/uploads/1/3/0/5/130543198/3545774.pdf
    • http://www.mariannecarrascous.com/uploads/1/3/0/7/130776241/3872af1f18ee61d.pdf
    • http://skycruizair.com/uploads/1/3/0/5/130539287/4455279.pdf
    • http://nhcohousing.org/uploads/1/3/0/6/130639364/zaxepowijuxebakimu.pdf
    • http://getfitbasics.com/uploads/1/3/0/7/130738666/b03cc998a0f9.pdf
    • http://ohwow.club/uploads/1/3/0/7/130775634/zepasizedur.pdf
    • http://hairbyjonathan.com/uploads/1/3/0/6/130620519/7663851.pdf
    • http://smsawani.com/uploads/1/3/0/6/130639634/4471540.pdf
    • http://power101jamz.net/uploads/1/3/0/3/130323178/gapidurovofi.pdf
    • http://sgdesign.org/uploads/1/3/0/7/130775997/f1373cf44.pdf
    • http://stcolumbanusalumni.org/uploads/1/3/0/2/130272988/4108651.pdf
    • http://drjanicecheng.com/uploads/1/3/0/6/130640197/toziramu-kolufuvuw-wasowopijef-fazabijek.pdf
    • http://xinleyuanyulecheng.br3h.com/uploads/1/3/0/9/130969656/130969656.html#arduino+code+for+stepper+motor+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ea5.bin
4eed389026a20a44050f58072be29d2c33bb86f53ebceed3ab4c1b6c0106bed9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2EA5 8072 bytes

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